/* mactest1.c - An example of a C macro function */#include <stdio.h>#define SUM(a, b, result) \            ((result) = (a) + (b))int main(){   int data1 = 5, data2 = 10;   int result;   float fdata1 = 5.0, fdata2 = 10.0;   float fresult;   SUM(data1, data2, result);   printf("The result is %d\n", result);   SUM(1, 1, result);   printf("The result is %d\n", result);   SUM(fdata1, fdata2, fresult);   printf("The floating result is %f\n", fresult);   SUM(fdata1, fdata2, result);   printf("The mixed result is %d\n", result);   return 0;}