/*------------------- PROGRAM USING FUNCTION ------------------*/
int mul (int a, int b);      /*------- DECLARATION ------------*/
/*-------------------- MAIN PROGRAM BEGINS --------------------*/

main ()
{ 
    int a, b, c;

    a = 5;
    b = 10;
    c = mul (a,b);

    printf (“multiplication of %d and %d is %d”,a,b,c);
}

/* ----------------    MAIN PROGRAM ENDS
       MUL() FUNCTION STARTS -----------------*/
int mul (int x, int y)
int p;

p = x*y;
    {
return(p);
    }
/* -------------------- MUL () FUNCTION ENDS ------------------*/