Diary Management System Project Using C Language

Introduction

Mini project in C Personal Diary Management System is a console application without graphics and is one of the top C programming language projects. Users may maintain a personal record in this project, just as they would in a journal. You can keep track of significant events in your life, such as meetings and other responsibilities.

The GCC compiler was used to build this little project on Personal Diary Management in C in the Code::Blocks IDE. It is comprehensive and error-free.

Source Code for Diary Management System Project Using C Language

#include<stdio.h>

#include<stdlib.h>

#include<conio.h>

#include<string.h>

int password();

void addrecord();

void viewrecord();

void editrecord();

void editpassword();

void deleterecord();

struct record

{

    char time[6];

    char name[30];

    char place[25];

    char duration[10];

    char note[500];

} ;

int main()

{

    int ch;

    printf("\n\n\t***********************************\n");

    printf("\t*PASSWORD PROTECTED PERSONAL DIARY*\n");

    printf("\t***********************************");

    while(1)

    {

        printf("\n\n\t\tMAIN MENU:");

        printf("\n\n\tADD RECORD\t[1]");

        printf("\n\tVIEW RECORD\t[2]");

        printf("\n\tEDIT RECORD\t[3]");

        printf("\n\tDELETE RECORD\t[4]");

        printf("\n\tEDIT PASSWORD\t[5]");

        printf("\n\tEXIT\t\t[6]");

        printf("\n\n\tENTER YOUR CHOICE:");

        scanf("%d",&ch);

        switch(ch)

        {

        case 1:

            addrecord();

            break;

        case 2:

            viewrecord();

            break;

        case 3:

            editrecord();

            break;

        case 4:

            deleterecord();

            break;

        case 5:

            editpassword();

            break;

        case 6:

            printf("\n\n\t\tTHANK YOU FOR USING THE SOFTWARE ");

            getch();

            exit(0);

        default:

            printf("\nYOU ENTERED WRONG CHOICE..");

            printf("\nPRESS ANY KEY TO TRY AGAIN");

            getch();

            break;

        }

        system("cls");

    }

    return 0;

}

void addrecord( )

{

    system("cls");

    FILE *fp ;

    char another = 'Y' ,time[10];

    struct record e ;

    char filename[15];

    int choice;

    printf("\n\n\t\t***************************\n");

    printf("\t\t* WELCOME TO THE ADD MENU *");

    printf("\n\t\t***************************\n\n");

    printf("\n\n\tENTER DATE OF YOUR RECORD:[yyyy-mm-dd]:");

    fflush(stdin);

    gets(filename);

    fp = fopen (filename, "ab+" ) ;

    if ( fp == NULL )

    {

        fp=fopen(filename,"wb+");

        if(fp==NULL)

        {

            printf("\nSYSTEM ERROR...");

            printf("\nPRESS ANY KEY TO EXIT");

            getch();

            return ;

        }

    }

    while ( another == 'Y'|| another=='y' )

    {

        choice=0;

        fflush(stdin);

        printf ( "\n\tENTER TIME:[hh:mm]:");

        scanf("%s",time);

        rewind(fp);

        while(fread(&e,sizeof(e),1,fp)==1)

        {

            if(strcmp(e.time,time)==0)

            {

                printf("\n\tTHE RECORD ALREADY EXISTS.\n");

                choice=1;

            }

        }

        if(choice==0)

        {

            strcpy(e.time,time);

            printf("\tENTER NAME:");

            fflush(stdin);

            gets(e.name);

            fflush(stdin);

            printf("\tENTER PLACE:");

            gets(e.place);

            fflush(stdin);

            printf("\tENTER DURATION:");

            gets(e.duration);

            fflush(stdin);

            printf("\tNOTE:");

            gets(e.note);

            fwrite ( &e, sizeof ( e ), 1, fp ) ;

            printf("\nYOUR RECORD IS ADDED...\n");

        }

        printf ( "\n\tADD ANOTHER RECORD...(Y/N) " ) ;

        fflush ( stdin ) ;

        another = getchar( ) ;

    }

    fclose ( fp ) ;

    printf("\n\n\tPRESS ANY KEY TO EXIT...");

    getch();

}

void viewrecord( )

{

    FILE *fpte ;

    system("cls");

    struct record customer ;

    char time[6],choice,filename[14];

    int ch;

    printf("\n\n\t\t*******************************\n");

    printf("\t\t* HERE IS THE VIEWING MENU *");

    printf("\n\t\t*******************************\n\n");

    choice=password();

    if(choice!=0)

    {

        return ;

    }

    do

    {

        printf("\n\tENTER THE DATE OF RECORD TO BE VIEWED:[yyyy-mm-dd]:");

        fflush(stdin);

        gets(filename);

        fpte = fopen ( filename, "rb" ) ;

        if ( fpte == NULL )

        {

            puts ( "\nTHE RECORD DOES NOT EXIST...\n" ) ;

            printf("PRESS ANY KEY TO EXIT...");

            getch();

            return ;

        }

        system("cls");

        printf("\n\tHOW WOULD YOU LIKE TO VIEW:\n");

        printf("\n\t1.WHOLE RECORD OF THE DAY.");

        printf("\n\t2.RECORD OF FIX TIME.");

        printf("\n\t\tENTER YOUR CHOICE:");

        scanf("%d",&ch);

        switch(ch)

        {

        case 1:

            printf("\nTHE WHOLE RECORD FOR %s IS:",filename);

            while ( fread ( &customer, sizeof ( customer ), 1, fpte ) == 1 )

            {

                printf("\n");

                printf("\nTIME: %s",customer.time);

                printf("\nMEETING WITH: %s",customer.name);

                printf("\nMEETING AT: %s",customer.place);

                printf("\nDURATION: %s",customer.duration);

                printf("\nNOTE: %s",customer.note);

                printf("\n");

            }

            break;

        case 2:

            fflush(stdin);

            printf("\nENTER TIME:[hh:mm]:");

            gets(time);

            while ( fread ( &customer, sizeof ( customer ), 1, fpte ) == 1 )

            {

                if(strcmp(customer.time,time)==0)

                {

                    printf("\nYOUR RECORD IS:");

                    printf("\nTIME: %s",customer.time);

                    printf("\nMEETING WITH: %s",customer.name);

                    printf("\nMEETING AT: %s",customer.place);

                    printf("\nDUARATION: %s",customer.duration);

                    printf("\nNOTE: %s",customer.note);

                }

            }

            break;

        default:
            printf("\nYOU TYPED SOMETHING ELSE...\n");

            break;

        }

        printf("\n\nWOULD YOU LIKE TO CONTINUE VIEWING...(Y/N):");

        fflush(stdin);

        scanf("%c",&choice);

    }
    while(choice=='Y'||choice=='y');

    fclose ( fpte ) ;

    return ;

}

void editrecord()

{

    system("cls");

    FILE *fpte ;

    struct record customer ;

    char time[6],choice,filename[14];

    int num,count=0;

    printf("\n\n\t\t*******************************\n");

    printf("\t\t* WELCOME TO THE EDITING MENU *");

    printf("\n\t\t*******************************\n\n");

    choice=password();

    if(choice!=0)

    {

        return ;

    }

    do

    {

        printf("\n\tENTER THE DATE OF RECORD TO BE EDITED:[yyyy-mm-dd]:");

        fflush(stdin);

        gets(filename);

        printf("\n\tENTER TIME:[hh:mm]:");

        gets(time);

        fpte = fopen ( filename, "rb+" ) ;

        if ( fpte == NULL )

        {

            printf( "\nRECORD DOES NOT EXISTS:" ) ;

            printf("\nPRESS ANY KEY TO GO BACK");

            getch();

            return;

        }

        while ( fread ( &customer, sizeof ( customer ), 1, fpte ) == 1 )

        {

            if(strcmp(customer.time,time)==0)

            {

                printf("\nYOUR OLD RECORD WAS AS:");

                printf("\nTIME: %s",customer.time);

                printf("\nMEETING WITH: %s",customer.name);

                printf("\nMEETING AT: %s",customer.place);

                printf("\nDURATION: %s",customer.duration);

                printf("\nNOTE: %s",customer.note);

                printf("\n\n\t\tWHAT WOULD YOU LIKE TO EDIT..");

                printf("\n1.TIME.");

                printf("\n2.MEETING PERSON.");

                printf("\n3.MEETING PLACE.");

                printf("\n4.DURATION.");

                printf("\n5.NOTE.");

                printf("\n6.WHOLE RECORD.");

                printf("\n7.GO BACK TO MAIN MENU.");

                do

                {

                    printf("\n\tENTER YOUR CHOICE:");

                    fflush(stdin);

                    scanf("%d",&num);

                    fflush(stdin);

                    switch(num)

                    {

                    case 1:
                        printf("\nENTER THE NEW DATA:");

                        printf("\nNEW TIME:[hh:mm]:");

                        gets(customer.time);

                        break;

                    case 2:
                        printf("\nENTER THE NEW DATA:");

                        printf("\nNEW MEETING PERSON:");

                        gets(customer.name);

                        break;

                    case 3:
                        printf("\nENTER THE NEW DATA:");

                        printf("\nNEW MEETING PLACE:");

                        gets(customer.place);

                        break;

                    case 4:
                        printf("\nENTER THE NEW DATA:");

                        printf("\nDURATION:");

                        gets(customer.duration);

                        break;

                    case 5:
                        printf("ENTER THE NEW DATA:");

                        printf("\nNOTE:");

                        gets(customer.note);

                        break;

                    case 6:
                        printf("\nENTER THE NEW DATA:");

                        printf("\nNEW TIME:[hh:mm]:");

                        gets(customer.time);

                        printf("\nNEW MEETING PERSON:");

                        gets(customer.name);

                        printf("\nNEW MEETING PLACE:");

                        gets(customer.place);

                        printf("\nDURATION:");

                        gets(customer.duration);

                        printf("\nNOTE:");

                        gets(customer.note);

                        break;

                    case 7:
                        printf("\nPRESS ANY KEY TO GO BACK...\n");

                        getch();

                        return ;

                        break;

                    default:
                        printf("\nYOU TYPED SOMETHING ELSE...TRY AGAIN\n");

                        break;

                    }

                }
                while(num<1||num>8);

                fseek(fpte,-sizeof(customer),SEEK_CUR);

                fwrite(&customer,sizeof(customer),1,fpte);

                fseek(fpte,-sizeof(customer),SEEK_CUR);

                fread(&customer,sizeof(customer),1,fpte);

                choice=5;

                break;

            }

        }

        if(choice==5)

        {

            system("cls");

            printf("\n\t\tEDITING COMPLETED...\n");

            printf("--------------------\n");

            printf("THE NEW RECORD IS:\n");

            printf("--------------------\n");

            printf("\nTIME: %s",customer.time);

            printf("\nMEETING WITH: %s",customer.name);

            printf("\nMEETING AT: %s",customer.place);

            printf("\nDURATION: %s",customer.duration);

            printf("\nNOTE: %s",customer.note);

            fclose(fpte);

            printf("\n\n\tWOULD YOU LIKE TO EDIT ANOTHER RECORD.(Y/N)");

            scanf("%c",&choice);

            count++;

        }

        else

        {

            printf("\nTHE RECORD DOES NOT EXIST::\n");

            printf("\nWOULD YOU LIKE TO TRY AGAIN...(Y/N)");

            scanf("%c",&choice);

        }

    }
    while(choice=='Y'||choice=='y');

    fclose ( fpte ) ;

    if(count==1)

        printf("\n%d FILE IS EDITED...\n",count);

    else if(count>1)

        printf("\n%d FILES ARE EDITED..\n",count);

    else

        printf("\nNO FILES EDITED...\n");

    printf("\tPRESS ENTER TO EXIT EDITING MENU.");

    getch();

}

int password()

{

    char pass[15]= {0},check[15]= {0},ch;

    FILE *fpp;

    int i=0,j;

    printf("::FOR SECURITY PURPOSE::");

    printf("::ONLY THREE TRIALS ARE ALLOWED::");

    for(j=0; j<3; j++)

    {

        i=0;

        printf("\n\n\tENTER THE PASSWORD:");

        pass[0]=getch();

        while(pass[i]!='\r')

        {

            if(pass[i]=='\b')

            {

                i--;

                printf("\b");

                printf(" ");

                printf("\b");

                pass[i]=getch();

            }

            else

            {

                printf("*");

                i++;

                pass[i]=getch();

            }

        }

        pass[i]='\0';

        fpp=fopen("SE","r");

        if (fpp==NULL)

        {

            printf("\nERROR WITH THE SYSTEM FILE...[FILE MISSING]\n");

            getch();

            return 1;

        }

        else

            i=0;

        while(1)

        {

            ch=fgetc(fpp);

            if(ch==EOF)

            {

                check[i]='\0';

                break;

            }

            check[i]=ch-5;

            i++;

        }

        if(strcmp(pass,check)==0)

        {

            printf("\n\n\tACCESS GRANTED...\n");

            return 0;

        }

        else

        {

            printf("\n\n\tWRONG PASSWORD..\n\n\tACCESS DENIED...\n");

        }

    }

    printf("\n\n\t::YOU ENTERED WRONG PASSWORD::YOU ARE NOT ALLOWED TO ACCESS ANY FILE::\n\n\tPRESS ANY KEY TO GO BACK...");

    getch();

    return 1;

}

void editpassword()

{

    system("cls");

    printf("\n");

    char pass[15]= {0},confirm[15]= {0},ch;

    int choice,i,check;

    FILE *fp;

    fp=fopen("SE","rb");

    if(fp==NULL)

    {

        fp=fopen("SE","wb");

        if(fp==NULL)

        {

            printf("SYSTEM ERROR...");

            getch();

            return ;

        }

        fclose(fp);

        printf("\nSYSTEM RESTORED...\nYOUR PASSWORD IS 'ENTER'\n PRESS ENTER TO CHANGE PASSWORD\n\n");

        getch();

    }

    fclose(fp);

    check=password();

    if(check==1)

    {

        return ;

    }

    do

    {

        if(check==0)

        {

            i=0;

            choice=0;

            printf("\n\n\tENTER THE NEW PASSWORD:");

            fflush(stdin);

            pass[0]=getch();

            while(pass[i]!='\r')

            {

                if(pass[i]=='\b')

                {

                    i--;

                    printf("\b");

                    printf(" ");

                    printf("\b");

                    pass[i]=getch();

                }

                else

                {

                    printf("*");

                    i++;

                    pass[i]=getch();

                }

            }

            pass[i]='\0';

            i=0;

            printf("\n\tCONFIRM PASSWORD:");

            confirm[0]=getch();

            while(confirm[i]!='\r')

            {

                if(confirm[i]=='\b')

                {

                    i--;

                    printf("\b");

                    printf(" ");

                    printf("\b");

                    confirm[i]=getch();

                }

                else

                {

                    printf("*");

                    i++;

                    confirm[i]=getch();

                }

            }

            confirm[i]='\0';

            if(strcmp(pass,confirm)==0)

            {

                fp=fopen("SE","wb");

                if(fp==NULL)

                {

                    printf("\n\t\tSYSTEM ERROR");

                    getch();

                    return ;

                }

                i=0;

                while(pass[i]!='\0')

                {

                    ch=pass[i];

                    putc(ch+5,fp);

                    i++;

                }

                putc(EOF,fp);

                fclose(fp);

            }

            else

            {

                printf("\n\tTHE NEW PASSWORD DOES NOT MATCH.");

                choice=1;

            }

        }

    }
    while(choice==1);

    printf("\n\n\tPASSWORD CHANGED...\n\n\tPRESS ANY KEY TO GO BACK...");

    getch();

}

void deleterecord( )

{

    system("cls");

    FILE *fp,*fptr ;

    struct record file ;

    char filename[15],another = 'Y' ,time[10];;

    int choice,check;

    printf("\n\n\t\t*************************\n");

    printf("\t\t* WELCOME TO DELETE MENU*");

    printf("\n\t\t*************************\n\n");

    check = password();

    if(check==1)

    {

        return ;

    }

    while ( another == 'Y' )

    {

        printf("\n\n\tHOW WOULD YOU LIKE TO DELETE.");

        printf("\n\n\t#DELETE WHOLE RECORD\t\t\t[1]");

        printf("\n\t#DELETE A PARTICULAR RECORD BY TIME\t[2]");

        do

        {

            printf("\n\t\tENTER YOU CHOICE:");

            scanf("%d",&choice);

            switch(choice)

            {

            case 1:

                printf("\n\tENTER THE DATE OF RECORD TO BE DELETED:[yyyy-mm-dd]:");

                fflush(stdin);

                gets(filename);

                fp = fopen (filename, "wb" ) ;

                if ( fp == NULL )

                {

                    printf("\nTHE FILE DOES NOT EXISTS");

                    printf("\nPRESS ANY KEY TO GO BACK.");

                    getch();

                    return ;

                }

                fclose(fp);

                remove(filename);

                printf("\nDELETED SUCCESFULLY...");

                break;

            case 2:

                printf("\n\tENTER THE DATE OF RECORD:[yyyy-mm-dd]:");

                fflush(stdin);

                gets(filename);

                fp = fopen (filename, "rb" ) ;

                if ( fp == NULL )

                {

                    printf("\nTHE FILE DOES NOT EXISTS");

                    printf("\nPRESS ANY KEY TO GO BACK.");

                    getch();

                    return ;

                }

                fptr=fopen("temp","wb");

                if(fptr==NULL)

                {

                    printf("\nSYSTEM ERROR");

                    printf("\nPRESS ANY KEY TO GO BACK");

                    getch();

                    return ;

                }

                printf("\n\tENTER THE TIME OF RECORD TO BE DELETED:[hh:mm]:");

                fflush(stdin);

                gets(time);

                while(fread(&file,sizeof(file),1,fp)==1)

                {

                    if(strcmp(file.time,time)!=0)

                        fwrite(&file,sizeof(file),1,fptr);

                }

                fclose(fp);

                fclose(fptr);

                remove(filename);

                rename("temp",filename);

                printf("\nDELETED SUCCESFULLY...");

                break;

            default:

                printf("\n\tYOU ENTERED WRONG CHOICE");

                break;

            }

        }
        while(choice<1||choice>2);

        printf("\n\tDO YOU LIKE TO DELETE ANOTHER RECORD.(Y/N):");

        fflush(stdin);

        scanf("%c",&another);

    }

    printf("\n\n\tPRESS ANY KEY TO EXIT...");

    getch();

}

Output

Explanation

Personal Diary Management System is a console program that allows you to create, amend, and remove data. Many fields may be filled in, including task length, name, address, time, and date. To retain the records, file management has been quite successful.

The following are the fundamental user-defined functions utilized in this project:

• int password() – contains/manages/handles password protection
• void addrecord() – to add new diary record
• void viewrecord() – to view added record in list
• void editrecord() – to modify and update an added record
• void editpassword() – to modify/change a password
• void deleterecord() – to delete or remove a record permanently from system file

Final Words

After finishing the C programming language-based Diary Management System project, it's clear that this system is a useful way to keep track of daily tasks. The system lets users make entries for their daily activities and save them. They can also look at, change, or delete these entries as needed.

This project shows how the C programming language can be used to make a system for managing daily tasks that is easy to use and works well. Overall, the C-based Diary Management System project was a success, and it should be useful for people who want to keep track of and organise their daily activities.