修改代码使dfa可以在控制台输入而不是程序内

好的，为了让用户能够在控制台输入DFA，我们可以将代码改成使用`input()`函数来读取用户输入。以下是修改后的代码：

# 1. 从控制台读取DFA
dfa = {}
states_str = input('Enter states separated by commas: ')
states = states_str.split(',')
for state in states:
    dfa[state] = {}
symbols_str = input('Enter input symbols separated by commas: ')
symbols = symbols_str.split(',')
for state in dfa:
    for symbol in symbols:
        next_state = input(f'Enter next state for {state} with input symbol {symbol}: ')
        dfa[state][symbol] = next_state

# 2. 画出状态转换图输出
from graphviz import Digraph

dot = Digraph(comment='DFA')
dot.attr(rankdir='LR')

for state in dfa:
    if state == 'q0':
        dot.attr('node', shape='doublecircle')
    else:
        dot.attr('node', shape='circle')
    dot.node(state)

for state in dfa:
    for symbol in dfa[state]:
        next_state = dfa[state][symbol]
        dot.edge(state, next_state, label=symbol)

print('DFA State Transition Diagram:')
print(dot.source)

# 3. 进行化简
def equivalent_states(state1, state2, dfa, marked):
    if (state1 in marked and state2 not in marked) or (state1 not in marked and state2 in marked):
        return False
    marked.add(state1)
    marked.add(state2)
    for symbol in dfa[state1]:
        next_state1 = dfa[state1][symbol]
        next_state2 = dfa[state2][symbol]
        if next_state1 != next_state2:
            if not equivalent_states(next_state1, next_state2, dfa, marked):
                return False
    return True

def minimize_dfa(dfa):
    # 初始化等价状态集
    equivalent_states_set = set()
    for state1 in dfa:
        for state2 in dfa:
            if state1 != state2:
                if not (state1 in equivalent_states_set and state2 in equivalent_states_set):
                    if equivalent_states(state1, state2, dfa, set()):
                        equivalent_states_set.add(state1)
                        equivalent_states_set.add(state2)
    # 构建新的DFA
    new_dfa = {}
    state_mapping = {}
    new_states_count = 0
    for state in dfa:
        if state in equivalent_states_set:
            continue
        new_state = 'q' + str(new_states_count)
        state_mapping[state] = new_state
        new_dfa[new_state] = {}
        new_states_count += 1
    for state1 in dfa:
        if state1 in equivalent_states_set:
            continue
        new_state1 = state_mapping[state1]
        for symbol in dfa[state1]:
            next_state1 = dfa[state1][symbol]
            if next_state1 in equivalent_states_set:
                continue
            new_next_state1 = state_mapping[next_state1]
            new_dfa[new_state1][symbol] = new_next_state1
    return new_dfa

minimized_dfa = minimize_dfa(dfa)
print('Minimized DFA:')
print(minimized_dfa)

# 4. 把化简后DFA以状态转换图方式输出到屏幕或文件
dot = Digraph(comment='Minimized DFA')
dot.attr(rankdir='LR')

for state in minimized_dfa:
    if state == 'q0':
        dot.attr('node', shape='doublecircle')
    else:
        dot.attr('node', shape='circle')
    dot.node(state)

for state in minimized_dfa:
    for symbol in minimized_dfa[state]:
        next_state = minimized_dfa[state][symbol]
        dot.edge(state, next_state, label=symbol)

print('Minimized DFA State Transition Diagram:')
print(dot.source)

这段代码会先从控制台读取用户输入的DFA，然后画出状态转换图输出。接着会进行化简，并输出化简后的DFA以状态转换图方式输出到屏幕或文件。