[编程入门]利润计算 c++

参考代码:

#include<iostream>

using namespace std;

int fun(  long int a)

{

double b;

if (a <= 100000)b = a * 0.1;

if (a > 100000 && a <= 200000) 

{

b = 100000 * 0.1 + ((a - 100000)*0.075);

}

if(a>200000&&a<=400000)

{

b = 100000 * 0.1 + 100000 * 0.075 + (a - 200000)*0.05;

}

if (a > 400000 && a <= 600000)

{

b = 100000 * 0.1 + 100000 * 0.075 + 200000 * 0.05 + (a - 400000)*0.03;

}

if (a > 600000 && a <= 1000000)

{

b = 100000 * 0.1 + 100000 * 0.075 + 200000 * 0.05 + 200000 * 0.03 + (a - 600000)*0.015;

}

if (a > 1000000)b = 100000 * 0.1 + 100000 * 0.075 + 200000 * 0.05 + 200000 * 0.03 + 400000 * 0.015 + (a - 1000000)*0.01;

return b;

}

int  main()

{

long int a; double b;

cin >> a;

b = fun(a);

cout << (long int)b << endl;

}