631(数字反向).cpp

按Pearson Prentice Hall

#include <iostream.h>
#include <math.h>
int fun(int y){
	int n,sum=0;
	int a;
	int b;
	b=(int)log10(y);
	for (n=b+1;n>=1;n--){
		a=(int)(y%(int)pow(10,n)/pow(10,n-1));
		sum=(int)(a*pow(10,b+1-n))+sum;
	}
	cout << "" << sum << endl;
	return 0;
}

void main(){
	int i;
	cout << "Enter a number:";
	cin >> i;
	fun (i);
}