#include <stdio.h>
#include <stdlib.h>
// #define func_name(parameter) expression
#define afunc(x) scanf("%d", &x)
#define bfunc(x) scanf("%f", &x)
int main()
{
int aa;
float bb, cc;
printf("enter an integer: ");
afunc(aa);
printf("enter an value: ");
bfunc(bb);
cc = bb * aa;
printf("aa * bb = %.2f\n", cc);
system("pause");
return 0;
}