Programs using Functions and Pointers in C

/* C Program to swap two numbers using pointers and function. */
#include
void swap(int *n1, int *n2);
int main()
{
    int num1 = 5, num2 = 10;
    // address of num1 and num2 is passed to the swap function
    swap( &num1, &num2);
    printf("Number1 = %d\n", num1);
    printf("Number2 = %d", num2);
    return 0;
}

void swap(int * n1, int * n2)
{
    // pointer n1 and n2 points to the address of num1 and num2 respectively
    int temp;
    temp = *n1;
    *n1 = *n2;
    *n2 = temp;
}




OUTPUT :-

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