#include <stdio.h>
int main(void)
{
   int    miles,yards;
   float  kilometers;
   miles = 26;
   yards = 385;
kilometers = 1.609*(miles + yards/1760.0);
printf("\nA marathon is %f kilometers.\n\n",kilometers);
return 0;
}

显示Debug/2.exe : fatal error LNK1169: one or more multiply defined symbols found

没错啊

#include <stdio.h>
 int main(void)
 {
    int    miles,yards;
    float  kilometers;
    miles = 26;
    yards = 385;
 kilometers = 1.609*(1.0*miles + 1.0*yards/1760.0);   //加1.0*你试试
 printf("\nA marathon is %f kilometers.\n\n",kilometers);
 return 0;
 }

能解释下吗  哥

4楼的回答对不对？  还是不对的话我就不知道了

有用了  我只是想知道为什么这样改  谢谢

kilometers = 1.609*(1.0*miles + 1.0*yards/1760.0);    yard,miles都是int 整型不带小数的.  kilometers是float浮点型带小数的, 1.0*是int强制转换为float
你也可以这样来 kilometers = 1.609*((float）miles + (float)(yards)/1760.0);