Add given timestamps by overloading + operator in C++ Time Class

Difficulty Level : Hard
Last Updated : 30 Aug, 2021

In C++, we can make operators to work for user-defined classes. This means C++ has the ability to provide the operators with a special meaning for a data type, this ability is known as operator overloading.
In this article, we will overload an operator ‘+’ in the Time class so that we can concatenate two timestamps by just using +.

Example:

Input: T1 = 5:50:30, T2 = 7:20:34
Output: 13:11:4

Approach: To achieve the + operator overloading, below steps/functions are made:

Class Time is defined in which there are 3 variables to store the value of hours, minutes and seconds respectively.

int HR, MIN, SEC;
where HR is for hours, 
      MIN is for minutes, and 
      SEC is for seconds

setTime() function to set values of HR, MIN and SEC.

void setTime(int x, int y, int z)
{
    x = HR;
    y = MIN;
    z = SEC;
}

showTime() function to display the time in a specific format (HH:MM:SS).

void showTime()
{
    cout << HR << ":" << MIN << ":" << SEC;
}

normalize() function to convert the resultant time into standard form.

Overloading of + operator to add time T1 and T2 using operator overloading.

Below is the C++ program implementing + overloading to add two timestamps:

C++

// C++ program to implement + operator
// overloading to add two timestamps
 
#include <iostream>
using namespace std;
 
// Time class template
class Time {
private:
    int HR, MIN, SEC;
 
    // Defining functions
public:
    // Functions to set the time
    // in the Time class template
    void setTime(int x, int y, int z)
    {
        HR = x;
        MIN = y;
        SEC = z;
    }
 
    // Function to print the time
    // in HH:MM:SS format
    void showTime()
    {
        cout << endl
             << HR << ":" << MIN << ":" << SEC;
    }
 
    // Function to normalize the resultant
    // time in standard form
    void normalize()
    {
        MIN = MIN + SEC / 60;
        SEC = SEC % 60;
        HR = HR + MIN / 60;
        MIN = MIN % 60;
    }
 
    // + Operator overloading
    // to add the time t1 and t2
    Time operator+(Time t)
    {
        Time temp;
        temp.SEC = SEC + t.SEC;
        temp.MIN = MIN + t.MIN;
        temp.HR = HR + t.HR;
        temp.normalize();
        return (temp);
    }
};
 
// Driver code
int main()
{
    Time t1, t2, t3;
    t1.setTime(5, 50, 30);
    t2.setTime(7, 20, 34);
 
    // Operator overloading
    t3 = t1 + t2;
 
    // Printing results
    t1.showTime();
    t2.showTime();
    t3.showTime();
 
    return 0;
}

Output:

5:50:30
7:20:34
13:11:4

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Add given timestamps by overloading + operator in C++ Time Class

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