The Problem

Make a simple program that reads two variables named A, B. Calculate and print the difference of A and B (A - B).

 

Input Specification

Input file will contain only two integer A and B (0<A, B<100 and A>B)

 

Output Specification

Output will show the difference of A and B in a separate line.

 

Sample Input

13 5

 

Sample Output

8

 

The solution of the program

 

 

I think you already know that. :)

 

 

Now the problem is same but just change the input specification and output specification

 

The Problem

Make a simple program that reads two variables named A, B. Calculate and print the difference of A and B (A - B).

 

Input Specification

Input file consist of several test cases. Each test case contains a line and each line will contains two integers A and B (0<A, B<100 and A>B). Input is terminated by EOF.

 

Output Specification

For each test case you should output a line. This line contains the value of the difference of A and B.

 

Sample Input

13 5

10 5

50 23

80 78

 

Sample Output

8

5

27

2

 

Now the solution of the program

 

Did you find the difference between the two solutions?

 

It's easy, just you need to add a while

while( there you need to add scanf() function )

{

            Other codes here

}

 

Why scanf(“%d %d”,&a,&b)==2 ?

• Because you are inputting two value.

 

If you input 3 integers then scanf(“%d %d %d”,&x,&y,&z)==3

Example

while(scanf(“%d %d %d”,&x,&y,&z)==3)

{

            Other code here

}

 

The differences are

 

 

I think you understand how can we input multiple lines and output multiple lines.

If you are not clear about the process please contact with me.

 

 

Prepared by: Shahin ShamS