Check if a string contains a string in C++

Question

Check if a string contains a string in C++

I have a variable of type std::string. I need to check in the event that it contains a certain std::string. How might I do that?

Is there a function that delivers valid if the string is found, and false on the off chance that it isn't?

substring string cpp

4 years ago by vishaljlf39

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**akshay1995** · Answer 1 · 2021-05-29T08:48:08

Use std::string::find as follows:



if (s1.find(s2) != std::string::npos) {

    std::cout << "found!" << '\n';

}

Note: "found!" will be printed if s2 is a substring of s1, both s1 and s2 are of type std::string.

**RoliMishra** · Answer 2 · 2021-05-31T12:10:06

You can try using the find function:

string str ("There are two needles in this haystack.");

string str2 ("needle");



if (str.find(str2) != string::npos) {

//.. found.

}

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Check if a string contains a string in C++

2 Answers

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