Function is defined above the function main: it is not necessary to prototype the function : Function Prototype « Function « C Tutorial

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C Tutorial » Function » Function Prototype

8.3.3.Function is defined above the function main: it is not necessary to prototype the function

#include <stdio.h>



void f1(int *k)

{

    *k = *k + 10;

}



main ( ){

    int i;

    i = 0;

    printf (" The value of i before call %d \n", i);

    f1 (&i);

    printf (" The value of i after call %d \n", i);

}

The value of i before call 0
       The value of i after call 10

8.3.Function Prototype
	8.3.1.	Function prototype
	8.3.2.	Function is defined after main: prototype the function
	8.3.3.	Function is defined above the function main: it is not necessary to prototype the function

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