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In call by reference, you are calling the program by passing the variables address(reference) to it. This is done through the use of functions. Any changes made in the variables to the function will be reflected even the calling function.

Here is a code snippet for swapping two numbers.


#include


void swap( int *a, int *b){

int temp = *a;

*a = *b;

*b = temp;

}


int main(){

int a=8, b=9;

printf("The value of a and b before swap = %d %d\n", a, b);

swap(a,b);

printf("The value of a and b after swap = %d %d\n", a, b);

return 0;

}

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