1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\xtgmath.h(214): warning C4602: #pragma pop_macro:“new”该标识符前面没有 #pragma push_macro
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\xtgmath.h(215): warning C4193: #pragma warning(pop) : 没有匹配的“#pragma warning(push)”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\xtgmath.h(216): warning C4161: #pragma pack(pop...) : 出栈的比入栈的多
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(23): error C2061: 语法错误: 标识符“abs”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(23): error C2059: 语法错误:“;”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(23): error C2061: 语法错误: 标识符“acos”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(23): error C2061: 语法错误: 标识符“asin”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(24): error C2061: 语法错误: 标识符“atan”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(24): error C2059: 语法错误:“;”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(24): error C2061: 语法错误: 标识符“atan2”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(24): error C2061: 语法错误: 标识符“ceil”
1>e:\极速考拉下载目录\vs2013(visual studio 2013旗舰版)\vc\include\cmath(25): error C2061: 语法错误: 标识符“cos”
若是switch单词写错了，则可能会出现上述错误。
输入1：
2+3*(7-4)+8/4#
输入2：
((2+3)*4-(8+2))/5#
1 #include <iostream>
2 #include <cctype>
3 #include <stack>
4 using namespace std;
5
6 int getPriority(char ch)
7 {
8 int priority = 0;
9 switch(ch)
10 {
11 case ‘+‘:
12 priority = 1;
13 break;
14 case ‘-‘:
15 priority = 1;
16 break;
17 case ‘*‘:
18 priority = 2;
19 break;
20 case ‘/‘:
21 priority = 2;
22 break;
23 case ‘(‘:
24 priority = 3;
25 break;
26 default:
27 priority = 0;
28 break;
29 }
30 return priority;
31 }
32
33
34 int main()
35 {
36 std::stack<char> S;
37 char ch;
38 cin >> ch;
39 while (ch != ‘#‘)
40 {
41 while (isdigit(ch))
42 {
43 cout << ch;
44 cin >> ch;
45 if(!isdigit(ch)) //ch 不是数字且不是‘#‘， 表示完成了一个整型数据的输入，此时打印一个空格
46 cout << " ";
47
48
49 }
50 if (ch == ‘#‘)
51 break;
52 if (ch == ‘)‘) //如果读入的字符是‘）‘，那么当栈顶元素不是‘（’时，一直输出栈顶元素
53 {
54 while (S.top() != ‘(‘)
55 {
56 cout << S.top()<< " ";
57 S.pop();
58 }
59 S.pop();
60 }
61 else //正常情况，将ch和栈顶字符比较优先级
62 {
63 while (!S.empty() && S.top() != ‘(‘ && getPriority(S.top()) >= getPriority(ch))
64 {
65 cout << S.top()<< " " ;
66 S.pop();
67 }
68 S.push(ch);
69
70 }cin >> ch;
71 }
72
73 while (!S.empty())
74 {
75 cout << S.top();
76 S.pop();
77 if (!S.empty())
78 cout << " ";
79 }
80
81 return 0;
82 }
原文地址：https://www.cnblogs.com/hi3254014978/p/9777420.html