Question

Write a C function to compute the following output (int) based on two input (int) variables:

output = a*a + b*b - 2*a*b

If the value of output is '0', then return -1 instead.

Call the C function 4 times from main() with values of 'a' and 'b' as follows and print output values for each case.

a = 3, b = 4

a = 1, b = 1

a = -2 b = 3

a = -4 b = -5

Answer 1

#include <stdio.h>

int getResult(int a, int b){
    int result = a*a + b*b - 2*a*b;
    if(result==0){
        return -1;
    }
    else{
        return result;
    }
}

int main()
{
    printf("%d\n",getResult(3,4));
    printf("%d\n",getResult(1,1));
    printf("%d\n",getResult(-2,3));
    printf("%d\n",getResult(-4,-5));

    return 0;
}