圆周率

复制代码

#include <iostream>
#include <algorithm>
using namespace std;

int main(){
    int n, a, b;
    while (cin >> a >> b >> n){
        int Integer = a / b;
        cout << Integer << ".";
        int Re = a%b;
        for (int i = 0; i < n; i++){
            if (Re != 0){
                a = Re * 10;
                Integer = a / b;
                cout << Integer;
                Re = a%b;
            }
            else
                cout << "0";
        }
        cout << endl;
    }
    //system("pause");
    return 0;
}