#include <stdio.h>
 int main()
 {int v1,v2;
           printf("*****************************************\n");
           printf("*                                       *\n");
         printf("*   please input ______ km              *\n");
         printf("*   is equal to  ______ m               *\n");
          printf("*                                       *\n");
         printf("*                                       *\n");
          printf("*****************************************\n");
        scanf("%d",&v1); v2 = 1000*v1;
         clrscr();
           printf("*****************************************\n");
           printf("*        1 Length   conversion          *\n");
         printf("*        2 Area     conversion          *\n");
         printf("*        3 Pressure conversion          *\n");
        printf("*          %d km = %d m               *\n",  v1,v2  );
         printf("*****************************************\n");
}
当输入50KM进行转换时。输出不是500000M 是一个负值。。。 有谁能解释一下吗？ 帮助修改。。。

Hello.....Is every one here ??????
论坛难道就没人了吗？

溢出了

int的范围在-32768~32767之间

那要怎么修改？可以告知一下。。。

怎么修改？告知一下··

额。。。那我应该怎么修改呢？ 帮忙完善一下。。

#include <stdio.h>
int main()
{
    int v1,v2;
           printf("*****************************************\n");
           printf("*                                       *\n");
         printf("*   please input ______ km              *\n");
         printf("*   is equal to  ______ m               *\n");
          printf("*                                       *\n");
         printf("*                                       *\n");
          printf("*****************************************\n");
        scanf("%d",&v1); v2 = 1000*v1;
//         clrscr();
           printf("*****************************************\n");
           printf("*        1 Length   conversion          *\n");
         printf("*        2 Area     conversion          *\n");
         printf("*        3 Pressure conversion          *\n");
        printf("*          %d km = %ld m               *\n",  v1,v2  );
         printf("*****************************************\n");
}

大哥，不行哦。。你试试输入50下去。一样的。-15536m。

LONG double 啊 换个类型撒