overloaded '+' operator concatenates strings : Plus « Overload « C++
overloaded '+' operator concatenates strings
#include <iostream>
using namespace std;
#include <string.h>
#include <stdlib.h>
class String{
private:
enum { SZ=80 };
char str[SZ];
public:
String() { strcpy(str, ""); }
String( char s[] ) { strcpy(str, s); }
void display() const { cout << str; }
String operator + (String ss) const {
String temp;
if( strlen(str) + strlen(ss.str) < SZ ){
strcpy(temp.str, str);
strcat(temp.str, ss.str);
}else{
cout << "\nString overflow"; exit(1);
}
return temp;
}
};
int main(){
String s1 = "aaa ";
String s2 = "bbb";
String s3;
s1.display();
s2.display();
s3.display();
s3 = s1 + s2;
s3.display();
return 0;
}
