#include <iostream>
using namespace std;
int main() {
int balance = 100, r = 12, goal = 200;
int years = 0;
while (balance < goal) {
balance = balance * (1 + r / 100.0);
years++;
cout << "第" << years << "年 : " << balance << endl;
}
cout << "需要" << years << "年。" << endl;
return 0;
}
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