c变量和方程

Question

感谢 Sankalp Bhamare 更新了代码和问题：更新后的代码未获得变量 twoHundredFiftyScholarship 中的预期值。

使用调试器时，我可以看到唯一不正确的值是变量 twoHundredFiftyScholarship.

输入样本时变量twoHundredFiftyScholarship的期望值运行#1应该是1，我得到的值是3。

与样本运行 #2 相同。期望值为8，我得到的值为48。

样本运行#1

去年基金有多少？

40000

每年的百分比是多少？

2

将颁发 0 美元 1000 美元的奖学金。

1 人将获得 500 美元的奖学金。

1 将获得 250 美元的奖学金。

样本运行#2

去年基金有多少？

1200000

每年的百分比是多少？

1

5人将获得1000美元的奖学金。

将颁发 10 笔 500 美元的奖学金。

将颁发 8 笔 250 美元的奖学金。

输入样本时变量twoHundredFiftyScholarship的期望值运行#2应该是8，我得到的值是48。

#include <stdio.h>
#include <stdlib.h>


int main(){

    double fundAmount;
    int yearlyInterestRate;
    double yearlyInterest;
    double remainingScholarship;
    int thousandScholarships = 0;
    int fiveHundredScholarship = 0;
    int twoHundredFiftyScholarship = 0;


    printf("How much was in the fund last year?\n");
    scanf("%lf", &fundAmount);

    printf("What is the yearly percentage rate?\n");
    scanf("%d", &yearlyInterestRate);

    yearlyInterest = fundAmount*yearlyInterestRate/100.0;
    remainingScholarship = yearlyInterest;
    thousandScholarships = remainingScholarship/1000.0;
    fiveHundredScholarship = remainingScholarship/500.0;
    twoHundredFiftyScholarship = remainingScholarship/250.0;

    if(thousandScholarships > 5){
        thousandScholarships = 5;

        remainingScholarship -= thousandScholarships*1000.0;}


    if(fiveHundredScholarship > 10){
        fiveHundredScholarship = 10;

        remainingScholarship -= fiveHundredScholarship*500;}



        remainingScholarship -= twoHundredFiftyScholarship*250;



        printf("%d 00 scholarships will be awarded.\n",thousandScholarships);
        printf("%d 0 scholarships will be awarded.\n",fiveHundredScholarship);       
        printf("%d 0 scholarships will be awarded.\n",twoHundredFiftyScholarship);



    system("pause");

    return 0;
}

Answer 1

Question 1: How many variables are needed for this problem?

这个问题毫无意义。假设你有一个变量声明为 int x; 然后你可以编码

int x1 = x;
int x2 = x*1;
int x3 = x+0;
int x4 = x|0;

那么 x、x1、x2、x3、x4 都包含相同的整数值，可以互换使用。

再假设您有两个变量和代码

int x= something();
int y= x+1;

然后（如果 y 以后没有更改）您可以用 x+1.

替换出现的 y

一定要阅读有关 C 编程语言的更多信息（特别是 Modern C) and How to debug small programs。

Answer 2

您可以简单地实现以上内容：

#include <stdio.h>

int main()
{

    double fundAmount = 100350.0;
    double yearlyInterestRate = 9.0;
    double yearlyInterest = fundAmount*yearlyInterestRate/100.0;

    double remainingScholarship = yearlyInterest;

    int thousandScholarships = remainingScholarship/1000.0;
    if(thousandScholarships > 5)
        thousandScholarships = 5;

    remainingScholarship -= thousandScholarships*1000.0;

    int fiveHundredScholarship = remainingScholarship/500.0;
    if (fiveHundredScholarship > 10)
        fiveHundredScholarship = 10;

    remainingScholarship -= fiveHundredScholarship*500;
    int twoHundredFiftyScholarship = remainingScholarship/250.0;
    remainingScholarship -= twoHundredFiftyScholarship*250;

    printf("00 Scholarships : %d\n",thousandScholarships);
    printf("0 Scholarships : %d\n",fiveHundredScholarship);
    printf("0 Scholarships : %d\n",twoHundredFiftyScholarship);
    printf("Residual Amount : %lf\n",remainingScholarship);
    return 0;
}

c变量和方程

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