/* 函数功能：求一个后缀表达式的值 */ double evalpost(char f[]); /* 函数功能：判断一个字符是否为运算符 */ int is_operation(char op); /* 函数功能：将一个中缀表达式e转换为与它等价的后缀表达式f */ void postfix(char e[], char f[]); /* 函数功能：求运算符的优先级 */ int priority(char op); /* 函数功能：将数字字符串转变成相应的数 */ double readnumber(char f[], int *i); /* 函数功能：判断表达式括号是否匹配 */ int match_kuohao(char c[]); 为这段代码编写测试代码

以下是对每个函数的测试代码：

1. evalpost(char f[])

#include <iostream>
#include <cstring>
#include "evalpost.h"
using namespace std;

int main() {
    char f[] = "23+45+*";
    double res = evalpost(f);
    cout << "Result: " << res << endl;
    return 0;
}

2. is_operation(char op)

#include <iostream>
#include <cstring>
#include "is_operation.h"
using namespace std;

int main() {
    char op = '+';
    int res = is_operation(op);
    cout << "Is operator: " << (res ? "true" : "false") << endl;
    return 0;
}

3. postfix(char e[], char f[])

#include <iostream>
#include <cstring>
#include "postfix.h"
using namespace std;

int main() {
    char e[] = "2+3*4+5";
    char f[100];
    postfix(e, f);
    cout << "Postfix expression: " << f << endl;
    return 0;
}

4. priority(char op)

#include <iostream>
#include <cstring>
#include "priority.h"
using namespace std;

int main() {
    char op = '*';
    int res = priority(op);
    cout << "Priority: " << res << endl;
    return 0;
}

5. readnumber(char f[], int *i)

#include <iostream>
#include <cstring>
#include "readnumber.h"
using namespace std;

int main() {
    char f[] = "123.45";
    int i = 0;
    double res = readnumber(f, &i);
    cout << "Number: " << res << endl;
    return 0;
}

6. match_kuohao(char c[])

#include <iostream>
#include <cstring>
#include "match_kuohao.h"
using namespace std;

int main() {
    char c[] = "((2+3)*4)";
    int res = match_kuohao(c);
    cout << "Matching brackets: " << (res ? "true" : "false") << endl;
    return 0;
}