string::compare - C++ Reference
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24// comparing apples with apples #include <iostream> #include <string> using namespace std; int main () { string str1 ("green apple"); string str2 ("red apple"); if (str1.compare(str2) != 0) cout << str1 << " is not " << str2 << "\n"; if (str1.compare(6,5,"apple") == 0) cout << "still, " << str1 << " is an apple\n"; if (str2.compare(str2.size()-5,5,"apple") == 0) cout << "and " << str2 << " is also an apple\n"; if (str1.compare(6,5,str2,4,5) == 0) cout << "therefore, both are apples\n"; return 0; }