/* 2.14 */
#include<stdio.h>

int main(void)
{
  const float revenue_per_150=4.5f;
  short jansold=23500;
  short febsold=19300;
  short marsold=21600;
  float revquarter=0.0f;

  long quartersold=jansold+febsold+marsold;

  printf("stock sold in\n jan: %d\n feb: %d\n mar: %d\n",
           jansold,febsold,marsold);
  printf("total stock sold in first quarter: %ld\n",quartersold);

  revquarter=quartersold/150*revenue_per_150;
  printf("sales revenue this quarter is:$%.2f\n",revquarter);
  getch();
  return 0;
}
输出结果因该是
stock sold in
jan:23500
feb:19300
mar:21600
total stock sold in first quarter:64400
sales revenue this quarter is :$1930.50
 我完全照书上打的
 可为什么到我实际执行
total stock sold in first quarter:-1136
sales revenue this quarter is :$-31.50
成两负数了啊????

[ 本帖最后由 y41699060 于 2011-5-9 20:37 编辑 ]

谢谢 你讲的很清楚  让我了解的问题根本了!! 难怪我用INT定义 一样也是负数 因为不知道是系统还是编译器的原因 INT也被定义成二字节  看来这题只能把所有的short全用long定义