//使用for循环
for(i=1;i<=100;i++)
{sum=sum+flag*i;
flag*=(-1);
}
printf("sum=%d\n",sum);
for(i=1;i<=100;i++)
{sum=sum+flag*i;
flag*=(-1);
}
printf("sum=%d\n",sum);
2015-01-23
//do-while循环
do{ sum=sum+flag*i;
i++;
flag*=(-1);
}while(i<=100);
do{ sum=sum+flag*i;
i++;
flag*=(-1);
}while(i<=100);
2015-01-23
//使用while循环
while(i<=100)
{ sum=sum+flag*i;
i++;
flag *=(-1);
}
while(i<=100)
{ sum=sum+flag*i;
i++;
flag *=(-1);
}
2015-01-23
#include <stdio.h>
int main()
{
int x = 0;
printf("x=%d\n",x++);
printf("x=%d\n",++x);
return 0;
}
int main()
{
int x = 0;
printf("x=%d\n",x++);
printf("x=%d\n",++x);
return 0;
}
2015-01-23