Question

Given the following C function prototype that accepts two integer arguments.

Complete the function and return 1 if a > b , return -1 if a < b and return 0 if a is equal to b.

C function to complete int compare(int a, int b)

Write a full c program that has the header required and will accept the user entry.

Answer 1

Solution:

Function prototype:

A function prototype is simply the declaration of a function that specifies the function's name, parameters, and return type. It doesn't contain a function body.

Code Screenshot:

Output Screenshot:

If a > b:

if a < b:

if a = b:

Code in Text Format:

#include<stdio.h> // header file

int compare(int a, int b); // function prototype

int main(){
   int a, b, result;
   // Asking inputs from user
   printf("Enter a value: ");
   scanf("%d",&a);
  
   printf("Enter b value: ");
   scanf("%d",&b);
  
   result = compare(a,b); // function call
  
   printf("%d",result);
   return 0;
}

int compare(int a, int b){ // function definition
   if(a > b){
       return 1; // return statement
   }
   else if(a < b){
       return -1; // return statement
   }
   else if(a == b){ // you can use else or else if
       return 0; // return statement
   }
}

Outputs in Text Format:

if a > b:

Enter a value: 5
Enter b value: 4
1

if a < b:

Enter a value: 2
Enter b value: 3
-1

if a= b:

Enter a value: 4
Enter b value: 4
0