Question

以下程序的功能是计算1-3+5-7+9……-99+101的值，请在---------上填写正确内容

#include<stdio.h>
main()
{ int i,t=1,s=0;
for(i=1;i<=101;i+=2)
{-------------------;
s=s+t;
--------------------;
}
printf("%d\n",s);
}

Answer 1

if(i>0) s=s+t;
else s=s-t;
win-TC运行，结果为51

Answer 2

t=t*i;

t=t/i*(-1);

Answer 3

t = (-1) ^ i * (2 * i - 1)

Answer 4

t=t*i;

t=t/i*(-1);