Question

C语言：输入一个四位正整数，求出该数对应的各位数字并输出，最后将千位和十位互换，百位何个位互换。

Answer 1

#include <stdio.h>
int main()
{
int number;
printf("请输入0~9999的数字：");
scanf("%d",&number);
if(number>9999||number<0)
{
printf("请输入0~9999的数字：");
return 0;
}
int ones=number%10,tens=number/10%10,hundreds=number/100%10,thousands=number/1000%10;
printf("个位：%d\n",ones);
printf("十位：%d\n",tens);
printf("百位：%d\n",hundreds);
printf("千位：%d\n",thousands);
printf("互换：%d\n",tens*1000+thousands*10+ones*100+hundreds);
return 0;
}