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Finding the first occurance of the word in C++

  1. Forget Code
  2. C++
  3. Finding the first occurance of the word 
#include <iostream>  
  #include <string>  
  using namespace std;  
    
  int main()  {  
     string s1 = "this is a test";  
     int n;  
    
     n = s1.find_first_of("is");  
     cout << n << endl;  
    
     return 0;  
  }