让计算机打印1到100再到1，例1.2.3........99.100.99.....3.2.1 谢谢啦 用while作

好了，已解决，#include int main(){ int a,b; a=1;b=100; while(a<=100) { printf("%d",a); a=a+1; } while(b>=1) { printf("%d",b); b=b-1; } sleep(5000); return 0;}

你那个不行，这样才规范
# include <stdio.h>
# include <stdlib.h>
int main()
{
int a,b;
    a=1;
b=100;
    while(a<=100)
    {
        printf("%d",a);
        a=a+1;
    }
    while(b>=1)
    {
printf("%d",b);
        b=b-1;
    }
system("pause");
return 0;
}

#include<stdio.h>#include <math.h> void main() { int k = 99; for (int i=1; i<200; i++,k--) { printf("%d\n",100 - abs(k)); } }

回答人的补充   2010-10-04 16:18

#include "stdafx.h"

// 求阶乘
int main(int argc, char* argv[])
{
 int num = 0;
 int sum = 1;
 printf("请输入求阶乘的数：");
 
 do {
  scanf("%d", &num);
  if (num < 1 || num > 10)
  {
   printf("输入错误，请重新输入：");
   continue;
  } else {
   break;
  }
 } while (1);

 while (num > 0)
 {
  sum = sum * num;
  num--;
 }

 printf("该数的阶乘为：%d\n", sum);
}