Question

Functions

1. Create a function to calculate multiplying 15 with 6 and trace the result.
2. Create a function to double the number 20. Have it return to myResults. Trace myResults

Answer 1

a) C program to create function to calculate multiplying 15 with 6

#include <stdio.h>

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

int main()
{
  
//calling function multiply-passing 15 and 6
multiply(15,6);
   
return 0;
}

//function multiply() implementation
multiply(int a, int b)
{
//variable to hold multiplication of two values
int res;
  
//multiplication of a and b
res = a * b;
  
//printing result of a multipled by b
printf("Result=%d",res);
}

Output: Result=90

b) C program to create function to double the number 20

#include <stdio.h>

//function prototype
int doubleValue(int x);

int main()
{
  
//calling function doubleValue-passing 20 and assigning it to result
int result = doubleValue(20);
  
//printing result to console
printf("\nResult=%d",result);
   
return 0;
}

//function doubleValue() implementation
int doubleValue(int a)
{
//variable declaration
int myResults;

//double the number
myResults = 2 * a;

//Have it return to myResults
return myResults;
}

Output: Result=40