|
#include <cstdlib>
#include <iostream>
using namespace std;
int main(int argc, char *argv[])
{
int n,i,total1,total2,sum;
printf("\n請輸入整數n值:");
scanf("%d",&n);
total1=0;
total2=0;
sum=0;
for(i=1;i<=n)
{
if((i++ % 2)==0)
total1 += i;
else
total2 += i;
}
sum=total2-total1;
printf("1-2+3-4+5-6+-.....+-n值為:%d\n",sum);
system("PAUSE");
return EXIT_SUCCESS;
} |
|