C語(yǔ)言實(shí)戰(zhàn)開(kāi)發(fā) 2019-11-15

用所學(xué)知識(shí)編寫簡(jiǎn)單的兩個(gè)程序

• 程序一：給定工資，計(jì)算稅后工資并輸出
• 程序二：以阿拉伯?dāng)?shù)字給定年齡，輸出數(shù)字年齡的英文翻譯

一、稅后工資實(shí)戰(zhàn)

/*
    輸入工資 計(jì)算稅后工資
    <5000
    5k-8k   10%     
    8k-10k  15%   
    >10k    20% 
    例如  10000：salary=10000-（10000-8000）*0.15-（8000-5000）*0.1=9400  
*/

#include <stdio.h>
#include <iostream>
using namespace std;
int main()
{
    float x;
    float salary;
    float tax; 
    printf("請(qǐng)輸入你的工資：");
    scanf("%f",&x);
    if(x>=10000)
        tax=(x-10000)*0.2+300+300;  
        else if(x>=8000&&x<10000)
            tax=(x-8000)*0.15+300; 
            else if(x>=5000&&x<8000)
                tax=(x-5000)*0.1;
                else tax=0;
                  salary=x-tax; 
    printf("你的稅后工資是:%f\n",salary); 
    return 0; 
}

• 次項(xiàng)目較為簡(jiǎn)單，多次利用if語(yǔ)句即可完成；
• 算法較多，可找到合適的算法對(duì)代碼進(jìn)行優(yōu)化，以上為優(yōu)化后源代碼。

二、輸出年齡

#include <stdio.h> 
int main()
{ 
    //x是個(gè)位  y是十位  z是11-19 
    char* gewei[]  = {"","one","two","three","four","five","six","seven","eight","nine"};
    char* shiwei[] = {"twenty","thiry","forty","fifty","sixty","seventy","eighty","ninety"};
    char* temp[]   = {"ten","eleven","twelve","thirteen","fourteen","fifteen","sixteen","seventeen","eignteen","nineteen"};

    int age;
    printf("請(qǐng)輸入你的年齡：");
    scanf("%d",&age);
    
    char *english;
    if(age<10&&age>0)
    {
        english = gewei[age];
    }
    else if(age<=19&&age>=10)
    {
        int index = age%10;
        english = temp[index];
    }
    else if(age>=20&&age<=99)  //將個(gè)位十位以此導(dǎo)出 g個(gè)位 s十位 
    {   
        int g = age%10;
        int s = age/10;
        char* sString = shiwei[s-2];
        char* gString = gewei[g];
        printf("age is %s-%s\n",sString,gString);
        return 0; //提前結(jié)束 
    } 
    printf("age is %s\n",english);
    return 0;
} 

本次實(shí)戰(zhàn)要點(diǎn)：

• 利用數(shù)組，將阿拉伯?dāng)?shù)字與英文聯(lián)系起來(lái)，用充分理解數(shù)字的含義并運(yùn)用到實(shí)際問(wèn)題中去
• 利用if判斷語(yǔ)句，對(duì)不同類型年齡進(jìn)行判斷
• 清楚了解各類數(shù)據(jù)類型的輸入輸出格式
• 涉及指針

存在的問(wèn)題：

• 當(dāng)年齡輸出20，30等整十時(shí) twenty- 這個(gè)“-”仍存在?？山o20，30等整十?dāng)?shù)字單獨(dú)判斷

反思

• 對(duì)數(shù)組理解不夠到位，正確輸出數(shù)值需多次判斷；
• 語(yǔ)法錯(cuò)誤仍存在，需要多多聯(lián)系，增加代碼量；
• 多多思考，培養(yǎng)編程思維；