将以下代码转换为Python代码: #include <bits/stdc++.h> using namespace std; char inputstream[50]; //存储输入字符串 int temp=0; //数组下标 int flag; //判断输出信息 void t(); void e(); void e1(); void t1(); void f(); void e(){ cout<<"E->TE'"<<endl; t(); e1(); } void e1(){ if(inputstream[temp]=='+') { cout<<"E'->+TE'"<<endl; temp++; t(); e1(); } else if(inputstream[temp]=='-') { cout<<"E'->-TE'"<<endl; temp++; t(); e1(); } else if (inputstream[temp]!='#'||inputstream[temp]!=')') { cout<<"T'->^"<<endl; } else flag=0; } void t(){ cout<<"T->FT'"<<endl; f(); t1(); } void t1(){ if(inputstream[temp]=='*') { cout<<"T'->*FT'"<<endl; temp++; f(); t1(); } else if(inputstream[temp]=='/'){ cout<<"T'->/FT'"<<endl; temp++; f(); t1(); } else if (inputstream[temp]!='#'&&inputstream[temp]!=')'&&inputstream[temp]!='+'&&inputstream[temp]!='-') { cout<<"T'->^"<<endl; flag=0; } } void f(){ if(inputstream[temp]=='i'){ cout<<"F->i"<<endl; temp++; } else if(inputstream[temp]=='('){ cout<<"F->(E)"<<endl; temp++; e(); if(inputstream[temp]==')'){ cout<<"F->(E)"<<endl; temp++; } else flag=0; } else flag=0; } int main(){ flag=1; cout<<"请输入要分析的字符串以#结束(^为空字符):"<<endl; cin>>inputstream; e(); if((inputstream[temp]=='#')&&flag) cout<<"分析成功,是合法算术表达式!"<<endl; else cout<<"分析失败,不是合法算术表达式!"<<endl; return 0; }
时间: 2024-03-21 16:41:30 浏览: 84
下面是将 C++ 代码转换为 Python 代码的结果:
```python
inputstream = "" # 存储输入字符串
temp = 0 # 数组下标
flag = None # 判断输出信息
def t():
print("T->FT'")
f()
t1()
def e():
print("E->TE'")
t()
e1()
def e1():
global temp, flag
if inputstream[temp] == '+':
print("E'->+TE'")
temp += 1
t()
e1()
elif inputstream[temp] == '-':
print("E'->-TE'")
temp += 1
t()
e1()
elif inputstream[temp] != '#' or inputstream[temp] != ')':
print("T'->^")
else:
flag = False
def t1():
global temp, flag
if inputstream[temp] == '*':
print("T'->*FT'")
temp += 1
f()
t1()
elif inputstream[temp] == '/':
print("T'->/FT'")
temp += 1
f()
t1()
elif inputstream[temp] != '#' and inputstream[temp] != ')' and inputstream[temp] != '+' and inputstream[temp] != '-':
print("T'->^")
flag = False
def f():
global temp, flag
if inputstream[temp] == 'i':
print("F->i")
temp += 1
elif inputstream[temp] == '(':
print("F->(E)")
temp += 1
e()
if inputstream[temp] == ')':
print("F->(E)")
temp += 1
else:
flag = False
else:
flag = False
if __name__ == '__main__':
flag = True
inputstream = input("请输入要分析的字符串以#结束(^为空字符):\n")
e()
if inputstream[temp] == '#' and flag:
print("分析成功,是合法算术表达式!")
else:
print("分析失败,不是合法算术表达式!")
```
注意,在 Python 中,没有 C++ 中的函数声明,因此需要将函数的定义顺序调整为正确的顺序。另外,在 Python 中需要使用 `global` 关键字来声明全局变量。
阅读全文