C++ Exercises: Compute the sum of three given integers. If the two values are same return the third value

Last update on April 07 2025 12:56:43 (UTC/GMT +8 hours)

Sum or Third Integer if Two are Equal

Write a C++ program to compute the sum of three given integers. Return the third value if the two values are the same.

Sample Solution:

C++ Code :

#include <iostream>
using namespace std;

// Function 'test' takes three integers (x, y, z) as parameters
int test(int x, int y, int z)
{
    // Check if x, y, and z are all equal
    if (x == y && y == z)
        return 0; // Return 0 if all three numbers are equal

    // Check if x and y are equal
    if (x == y)
        return z; // Return z if x and y are equal

    // Check if x and z are equal
    if (x == z)
        return y; // Return y if x and z are equal

    // Check if y and z are equal
    if (y == z)
        return x; // Return x if y and z are equal

    // If none of the above conditions are met, return the sum of x, y, and z
    return x + y + z;
}

int main() 
{
    // Testing the 'test' function with different sets of numbers
    cout << test(4, 5, 7) << endl; 
    cout << test(7, 4, 12) << endl;
    cout << test(10, 10, 12) << endl;
    cout << test(12, 12, 18) << endl;

    return 0;    
}

Sample Output:

16
23
12
18

Visual Presentation:

Flowchart:

For more Practice: Solve these Related Problems:

• Write a C++ program to compute the sum of three integers, but if any two of them are equal, return the third integer.
• Write a C++ program that reads three numbers and outputs the third number if a pair among the first two or last two is equal; otherwise, print the sum of all three.
• Write a C++ program to compare three integers and, in the case of a duplicate pair, return the unique value; if no duplicates exist, output their total.
• Write a C++ program that accepts three integer inputs and checks for equality among any two, returning the non-duplicate value or the sum if all are distinct.

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