c++ - how to tell if a string is contained in another string -

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this question has answer here:

c++ code. example: x: "this #my first program"; y: "#my"; 

bool function(string x, string y) { //return true if y contained in x  return ???;  }

you can use std::string::find()

bool function(string x, string y) {     return (x.find(y) != std::string::npos); }

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