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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. class Person {
  5. private:
  6.     int age;
  7.  
  8. public:
  9.     Person(int a) {
  10.         age = a;
  11.     }
  12.  
  13.     bool operator>(Person obj) {
  14.         return age > obj.age;
  15.     }
  16.  
  17.     bool operator==(Person obj) {
  18.         return age == obj.age;
  19.     }
  20. };
  21.  
  22. int main() {
  23.     int age1, age2;
  24.  
  25.     cout << "Input 1: ";
  26.     if (!(cin >> age1)) {
  27.         cout << "Invalid" << endl;
  28.         return 0;
  29.     }
  30.  
  31.     cout << "Input 2: ";
  32.     if (!(cin >> age2)) {
  33.         cout << "Invalid" << endl;
  34.         return 0;
  35.     }
  36.  
  37.     if (age1 < 0 || age2 < 0) {
  38.         cout << "Invalid" << endl;
  39.         return 0;
  40.     }
  41.  
  42.     Person p1(age1);
  43.     Person p2(age2);
  44.  
  45.     if (p1 > p2) {
  46.         cout << "Person 1 is larger" << endl;
  47.     } else if (p2 > p1) {
  48.         cout << "Person 2 is larger" << endl;
  49.     } else if (p1 == p2) {
  50.         cout << "Both are equal" << endl;
  51.     }
  52.  
  53.     return 0;
  54. }
  55.  
Success #stdin #stdout 0.01s 5296KB
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stdin
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Standard input is empty
stdout
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Input 1: Invalid
https://ideone.com/VUJ7nr
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

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