Determine whether there is an element in the string type

.find() function

Exist returns the first character subscript of the searched string in the string

There is no return -1

#include<bits/stdc++.h>
using namespace std;
int main()
{
	string a="caababc";
	string b="abc";
	int c=a.find(b);
	cout<<c<<endl; 
	return 0;
}