【求助】int
# include <stdio.h>
void main()
{
int num;
/* 下面定义的各变量，分别代表个位，十位，百位，千位，万位，十万位以及位数 */
int indiv, ten, hundred, thousand;
int ten_thousand, hundred_thousand, place;
printf("请输入一个整数(0～999999)：");
scanf("%d", &num);
/* 判断变量num的位数 */
if(num > 99999)
place = 6;
else if(num > 9999)
place = 5;
else if(num > 999)
place = 4;
else if(num > 99)
place = 3;
else if(num > 9)
place = 2;
else
place = 1;
printf("place = %d\n", place);
printf("每位数字为：");
/* 求出num在各位上的值 */
hundred_thousand = num/100000;
ten_thousand = (num - hundred_thousand*100000)/10000;
thousand = (num - hundred_thousand*100000 - ten_thousand*10000)/1000;
hundred = (num - hundred_thousand*100000 - ten_thousand*10000
- thousand*1000)/100;
ten = (num - hundred_thousand*100000 - ten_thousand*10000
- thousand*1000 - hundred*100)/10;
indiv = num - hundred_thousand*100000 - ten_thousand*10000
- thousand*1000 - hundred*100 - ten*10;
/* 判断变量num的位数，并根据位数做出相应的输出 */
switch(place)
{
case 1: printf("%d", indiv);
printf("\n反序数字为：");
printf("%d\n", indiv);
break;
case 2: printf("%d, %d", ten, indiv);
printf("\n反序数字为：");
printf("%d%d\n", indiv, ten);
break;
case 3: printf("%d, %d, %d", hundred, ten, indiv);
printf("\n反序数字为：");
printf("%d%d%d\n", indiv, ten, hundred);
break;
case 4: printf("%d, %d, %d, %d", thousand, hundred, ten, indiv);
printf("\n反序数字为：");
printf("%d%d%d%d\n", indiv, ten, hundred, thousand);
break;
case 5: printf("%d, %d, %d, %d, %d", ten_thousand, thousand,
hundred, ten, indiv);
printf("\n反序数字为：");
printf("%d%d%d%d%d\n", indiv, ten, hundred,
thousand, ten_thousand);
break;
case 6: printf("%d, %d, %d, %d, %d, %d", hundred_thousand,
ten_thousand, thousand, hundred, ten, indiv);
printf("\n反序数字为：");
printf("%d%d%d%d%d%d\n", indiv, ten, hundred, thousand,
ten_thousand, hundred_thousand);
break;
default: printf("Not find.\n");
break;
}
}
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