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C Exercises: Add two numbers

C Pointer : Exercise-4 with Solution

Write a program in C to add two numbers using pointers.

Pictorial Presentation:

C Exercises: Pictorial: Add two numbers.

Sample Solution:

C Code:

#include <stdio.h>
int main()
{
   int fno, sno, *ptr, *qtr, sum;
   
   printf("\n\n Pointer : Add two numbers :\n"); 
   printf("--------------------------------\n");   
 
   printf(" Input the first number : ");
   scanf("%d", &fno);
   printf(" Input the second  number : ");
   scanf("%d", &sno);   
 
   ptr = &fno;
   qtr = &sno;
 
   sum = *ptr + *qtr;
 
   printf(" The sum of the entered numbers is : %d\n\n",sum);
 
   return 0;
}

Sample Output:

 Pointer : Add two numbers :                                                                                  
--------------------------------                                                                              
 Input the first number : 5                                                                                   
 Input the second  number : 6                                                                                 
 The sum of the entered numbers is : 11

Flowchart:

Flowchart: Add two numbers

C Programming Code Editor:

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Next: Write a program in C to add numbers using call by reference.

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C Programming: Tips of the Day

Static variable inside of a function in C

The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().

The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.

The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().

Ref : https://bit.ly/3fOq7XP