#include <stdio.h>
void main()
{
 const float revenue_per_150 = 4.5f;
 short jansold=23500,febsold=19300,marsold=21600;
 float requarter=0.0f;
 long quartersold = jansold+febsold+marsold;
 printf("stock sold in\n jansold: %d\n febsold: %d\n marsold: %d\n",jansold,febsold,marsold);
 requarter = quartersold/150*revenue_per_150;
 printf("\ntotal stock sold in first quarter: %ld",quartersold);
 printf("\nsale revenue this quarter is: $%.2f",requarter);
 getch();
}

在改变quartersold的声明为long之后，输出依旧为负数，为何？？？

vc++6.0输出：
 stock sold in
 jansold: 23500
 febsold: 19300
 marsold: 21600

total stock sold in first quarter: 64400
sale revenue this quarter is: $1930.50
试着把short改成long看看

恩，谢谢 输出变成正数了，但是有一个月份的输出为零，
之前不该声明的时候输出是正确的，我不知道是我的编译器缘故还是别的原因！！