Question

How to search a string for the first character that does not match any of the characters specified in C++

Answer 1

#include <iostream>
#include <string>

using std::cout;
using std::endl;
using std::string;

int main()
{
	string s = "c c++ java php";

	std::size_t i = s.find_first_not_of("abcdefghijklmnopqrstuvwxyz ");

	if (i != string::npos)
		cout << "The first not match character is: " << s[i] << " at position: " << i << endl;

	return 0;
}


/*
run:

The first not match character is: + at position: 3

*/

 

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