Computer Programming C Laboratory: Pointers C Programs

Write a C program to explain about call by reference (Using Pointers and Functions)

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call by reference - Using Pointers and Functions - C Programming

Write a C program to explain about call by reference.

/* C Program to explain about call by reference */

#include <stdio.h>

main ()

{

int a=10; b=20;

printf ("\n Before calling the function a&b is %d,%d",a,b);

void change(&a,&b); /* change is a function call with parameters */

printf ("\n After calling the function a&b is %d %d", a,b);

} /* main */

void change(x,y)

int x,y;

{

x=x+5;

y=y+10;

printf ("In the function changes a&b is %d,%d", *x, *y);

} /* change */

OUTPUT

Before calling the function a&b is 10,20..

In the function changes a&b is 15,30.

After calling the function a&b is 15,30.

EXPLANATION: Prints values of variables a and b, then call function change() with address of variables a, b are referred as x,y in the function. Inside the function, the values are added to the constant variable and prints the values through pointer variables x and y. The main function prints the value of a and b after function calling.

Computer Programming C Laboratory: Pointers C Programs : Tag: C Programming : - Write a C program to explain about call by reference (Using Pointers and Functions)

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Computer Programming C Laboratory: Pointers C Programs

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