四位数.cpp

解压后 每个.cpp都有中文名很清楚。我是初学者

#include<stdio.h>
void main()
{
    int num,a,b,c,d,sum;
	printf("Enter num:");
	scanf("%d",&num);
	if (num>=0 && num<10)
		printf("the num is 1 wei\n");
	else if (num>=10 && num<100)
	    printf("the num is 2 wei\n");
	else if (num>=100 && num<1000)
	    printf("the num is 3 wei\n");
    else if (num>=1000 && num <10000)
	    printf("the num is 4 wei\n");
    else 
	    printf("the num is wrong\n");
	
	a=(num/1000)%10;
	b=((num-1000*a)/100)%10;
	c=((num-1000*a-100*b)/10)%10;
	d=num-1000*a-100*b-10*c;

	printf("the 4 wei is %d\n",a);
	printf("the 3 wei is %d\n",b);
	printf("the 2 wei is %d\n",c);
	printf("the 1 wei is %d\n",d);

	sum=1000*d+100*c+10*b+a;
    printf("the number is %d\n",sum);
}