Question

This is a c++ question

we are not using namespace std at the top

Subtraction + Decision and Loop

This is a twist on the previous exercise that will help you review loops and decision structures. You will again ask the user to enter two numbers. However, you will ALWAYS subtract the smaller number from the larger number to ensure that you never get a negative number for an answer. You do this by checking the numbers and switching them if they are not in the right order (larger then smaller). All of this checking, switching, subtracting, and output of the answer should occur in a function.

((( THIS WAS THE PREVIOUS EXERCISE

Function Basics - Arguments and Parameters

This is another easy exercise to test your knowledge of the fundamentals. In main(), ask the user to enter two integers. Pass those two integers to a function that will subtract one number from another. This function must also output the answer to the user.

Output:

Enter two integers (separated by a space) and this program will subtract them: [user enters: 5 7]

5 - 7 = -2

Notes and Hints:

1) From now on, you must use a function prototype for all programs that use functions. Don't expect me to ask for it in each exercise. )))

Finally, ask the user if they would like to run the program again. By now, you should know exactly what type of loop to use.

Output:

Enter two integers (separated by a space) and this program will subtract the smaller from the larger: [user enters: 7 5]

7 - 5 = 2
Do you want to run this program again? [user enters: y]

Enter two integers (separated by a space) and this program will subtract the smaller from the larger:   [user enters: 5 7]

7 - 5 = 2
Do you want to run this program again? [user enters: n]

Notes and Hints:

1) As always, make sure you accept an upper or lower case 'Y'

Answer 1

#include<iostream>
void subtract(int x,int y)
{
int sub;
if(x<y) //if it's true then swap the values of x and y
{
int t = x;
x=y;
y=t;
}
sub = x-y;
printf("\nAbsolute subtraction of %d and %d is: %d",x,y,sub);
}
int main()
{
int a,b;
char c='y';
while(c=='y' || c=='Y') //loops until user provides something else other than 'y' or 'Y'
{
printf("\nEnter two integers:\n");
scanf("%d",&a);
scanf(" %d",&b);
subtract(a,b);
printf("\nDo you want to continue?");
scanf(" %c",&c); //this loop continues if c is either 'y' or 'Y'
}
}

OUTPUT:

Enter two integers: Absolute subtraction of 2 and 1 is: 1 Do you want to continue?y Enter two integers: Absolute subtraction of 4 and 1 is: 3, Do you want to continue?y Enter two integers: 10 19 Absolute subtraction of 19 and 10 is: 9 Do you want to continue?n