Question

用c语言编程计算1-2+3-4+5......+99-100

Answer 1

#include <stdio.h>

main()
{
int i,t,sum;
i=1;
sum=0;
for(t=1;t<=100;t++)
{
sum=sum+i*t;
i=-i;
}
printf("%d\n",sum);
}

Answer 2

#include <stdio.h>

main()
{
int i, t= -1, sum = 0;
for (i = 1; i <= 100; i++)
sum += i * (t *= -1);
printf("%d\n",sum);
}

请大家继续盖楼！！

Answer 3

int sum = 0;
for(int i=1;i<=100;i++)
{
sum + = i%2==0 ? -i:i;
}

Answer 4

int i;
int j;
int sum1=0;
int sum2=0;
int sum;
for(i=1;i<100;i+=2){
sum1 +=i;
}
for(j=2;j<=100;j+=2){
sum2 +=j;
}
sum = sum1-sum2;

Answer 5

顶一楼