C++ examples for Class:Operator Overload
Overloaded '==' operator compares strings
#include <iostream> using namespace std; #include <string.h> //for strcmp() class String //user-defined string type { private://w ww. ja v a 2s .c o m enum { SZ = 80 }; //size of String objects char str[SZ]; //holds a string public: String() //constructor, no args { strcpy(str, ""); } String( char s[] ) //constructor, one arg { strcpy(str, s); } void display() const { cout << str; } void getstr() { cin.get(str, SZ); } bool operator == (String ss) const //check for equality { return ( strcmp(str, ss.str)==0 ) ? true : false; } }; int main() { String s1 = "yes"; String s2 = "no"; String s3; cout << "\nEnter 'yes' or 'no': "; s3.getstr(); //get String from user if(s3==s1) //compare with "yes" cout << "You typed yes\n"; else if(s3==s2) //compare with "no" cout << "You typed no\n"; else cout << "You didn't follow instructions\n"; return 0; }