/* * file: main5.c * main C program that uses assembly routine in sub5.asm * to create executable: * DJGPP:   gcc -o sub5 main5.c sub5.o asm_io.o * Borland: bcc32 sub5.obj main5.c asm_io.obj */#include <stdio.h>#include "cdecl.h"void PRE_CDECL calc_sum( int, int * ) POST_CDECL; /* prototype for assembly routine */int main( void ){  int n, sum;  printf("Sum integers up to: ");  scanf("%d", &n);  calc_sum(n, &sum);  printf("Sum is %d\n", sum);  return 0;}