编辑代码

#include <iostream>
using namespace std;

void profit(double x, int m);
static int j = 0;
int main()
{
    double a; // 资金
    int m; // 月份数 
    cout << "请输入资金：" << endl;
    cin >> a;
    cout << "请输入月份数：" << endl;
    cin >> m;
    profit(a, m);
    return 0;
} 

void profit(double x, int m)
{
    if (j < m)
    {   
        j++;
        double y;
        y = (0.13 * x - 20) + x;
        cout << "第 " << j << " 月盈利：" << y << endl;
        profit(y, m);
    }   
    else
        return;
    
}