C Exercises: Add two numbers using call by reference
C Pointer : Exercise-5 with Solution
Write a program in C to add numbers using call by reference.
Pictorial Presentation:
Sample Solution:
C Code:
#include <stdio.h>
long addTwoNumbers(long *, long *);
int main()
{
long fno, sno, sum;
printf("\n\n Pointer : Add two numbers using call by reference:\n");
printf("-------------------------------------------------------\n");
printf(" Input the first number : ");
scanf("%ld", &fno);
printf(" Input the second number : ");
scanf("%ld", &sno);
sum = addTwoNumbers(&fno, &sno);
printf(" The sum of %ld and %ld is %ld\n\n", fno, sno, sum);
return 0;
}
long addTwoNumbers(long *n1, long *n2)
{
long sum;
sum = *n1 + *n2;
return sum;
}
Sample Output:
Pointer : Add two numbers using call by reference: ------------------------------------------------------- Input the first number : 5 Input the second number : 6 The sum of 5 and 6 is 11
Flowchart:
C Programming Code Editor:
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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
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