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C Exercises: A simple structure of function

C Function : Exercise-1 with Solution

Write a program in C to show the simple structure of a function.

Pictorial Presentation:

C Exercises: A simple structure of function

Sample Solution:

C Code:

#include <stdio.h>

    int sum (int, int);//function declaration
    int main (void)
    {
        int total;
		printf("\n\n Function : a simple structure of function :\n");
		printf("------------------------------------------------\n");	
        total = sum (5, 6);//function call
        printf ("The total is :  %d\n", total);
        return 0;
    }
    
    int sum (int a, int b) //function definition
    {
	    int s;
		s=a+b;
        return s; //function returning a value
    }

Sample Output:

 Function : a simple structure of function :
------------------------------------------------
The total is :  11

Flowchart:

Flowchart: A simple structure of function

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