From 1ad50f4df7b048ebbb66e117676645e596fb12e8 Mon Sep 17 00:00:00 2001
From: flykhan <liubo666666@outlook.com>
Date: Tue, 11 Jul 2023 10:30:30 +0800
Subject: [PATCH] =?UTF-8?q?day6=20homework:=20=E5=87=BD=E6=95=B0=E8=B0=83?=
 =?UTF-8?q?=E7=94=A8=E5=AE=9E=E7=8E=B0=E7=BA=B3=E7=A8=8E=E8=AE=A1=E7=AE=97?=
 =?UTF-8?q?=E7=9A=84=E9=9D=99=E6=80=81=E5=86=85=E5=AD=98=E9=97=AE=E9=A2=98?=
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---
 day6/homework/h9.c | 30 ++++++++++++++++++------------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/day6/homework/h9.c b/day6/homework/h9.c
index b8af654..19c8625 100644
--- a/day6/homework/h9.c
+++ b/day6/homework/h9.c
@@ -15,33 +15,39 @@
 //     全月应纳税额超过80000元 45 %
 //     13505
 #include <stdio.h>
+#include <stdlib.h> // 用于 malloc 函数调用
 
-void *result(int, double *, int *);
+// int outNums[2]; // 3.全局地址？为什么要全局地址
+
+int *result(int, float *, int *);
 
 int main()
 {
-    int pretexIncome;                                             // 税前收入
-    double rates[8] = {0, 0.03, 0.1, 0.2, 0.25, 0.3, 0.35, 0.45}; // 税率数组
-    int deducts[8] = {0, 0, 105, 555, 1005, 2755, 5505, 13505};   // 速算扣除数数组
+    int pretexIncome;                                            // 税前收入
+    float rates[8] = {0, 0.03, 0.1, 0.2, 0.25, 0.3, 0.35, 0.45}; // 税率数组
+    int deducts[8] = {0, 0, 105, 555, 1005, 2755, 5505, 13505};  // 速算扣除数数组
 
     printf("请输入你的税前收入: ");
     scanf("%d", &pretexIncome);
 
-    result(pretexIncome, rates, deducts);
+    int *res;
+    res = result(pretexIncome, rates, deducts);
+    printf("你最后的所得为 %d ，你所缴纳的税额为 %d\n", res[0], res[1]);
 
-    // int *res = result(pretexIncome, rates, deducts);
-    // printf("%d%d", res[0], res[1]);
-    // printf("你最后的所得为 %d ，你所缴纳的税额为 %d\n", result(pretexIncome, rates, deducts)[1], result(pretexIncome, rates, deducts)[0]);
+    free(res); // 释放手动分配的内存空间
 
     return 0;
 }
 
-void *result(int pretexIncomeArgs, double *rateArgs, int *deductArgs)
+int *result(int pretexIncomeArgs, float *rateArgs, int *deductArgs)
 {
     int level;                          // 税率等级
     int tex;                            // 缴纳税额
     int aftertexIncome;                 // 税后收入
     int diff = pretexIncomeArgs - 3500; // 征税差值
+    // static int outNums[2];              // 1.静态地址？为什么要静态地址 (静态变量会放在全局区，仅会在程序结束时释放)
+    int *outNums = (int *)malloc(2 * sizeof(int *)); // 2.手动分配内存空间？为什么
+
     if (diff <= 0)
         level = 0;
     else if (diff > 0 && diff <= 1500)
@@ -62,8 +68,8 @@ void *result(int pretexIncomeArgs, double *rateArgs, int *deductArgs)
     tex = diff * rateArgs[level] - deductArgs[level];
     aftertexIncome = pretexIncomeArgs - tex;
 
-    printf("你最后的所得为 %d ，你所缴纳的税额为 %d\n", aftertexIncome, tex);
+    outNums[0] = aftertexIncome;
+    outNums[1] = tex;
 
-    // int outNums[2] = {(int *)aftertexIncome, (int *)tex};
-    // return *outNums; // 返回结果数组
+    return outNums; // 返回结果数组
 }
\ No newline at end of file