Program without Argument and without Return Value.

In this program, the task is to create a program having a function without arguments & without return values . So, we create a function outside the main function named as func() . In this function , void func is used, as the function returns no variable . Moreover , the function will not accept any variable or  arguments . With line func() , the program passes its control to function .after execution of the functions part , we will display the output . 

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#include<stdio.h>

#include<string.h>

#include<conio.h>

void func();

void main()

{     clrscr();

int a;

printf("enter value of a = ");

scanf("%d",&a);  

func();

printf("\n\n value of a after calling of function = %d",a);

getch();

}

void func()

{   int b =10;

printf("value of b inside function = %d",b);

}