如何编写main()函数判断含退格的两个输入流是否相等并输出YES/NO

Got it! Since you already have the function that processes strings with backspace characters (represented by <), let's break down how to build the main() function to check if two input streams result in the same string after processing.

Core Logic Steps #

• Grab the two input strings inputA and inputB (depending on your language, this could be via standard input, command-line arguments, etc.)
• Run your existing backspace-processing function on both inputs to get their final cleaned-up versions
• Compare the two processed results: print YES if they're identical, otherwise print NO

Example Implementation (Python) #

Let's assume your existing processing function is called process_backspace—here's how the main() would tie it all together:

def process_backspace(s):
    # Your pre-written backspace handling function
    char_stack = []
    for c in s:
        if c == '<':
            if char_stack:
                char_stack.pop()
        else:
            char_stack.append(c)
    return ''.join(char_stack)

def main():
    # Read input streams (adjust this if you need to read from files/args instead)
    inputA = input().strip()
    inputB = input().strip()
    
    # Process both inputs
    cleaned_a = process_backspace(inputA)
    cleaned_b = process_backspace(inputB)
    
    # Output the result
    print("YES" if cleaned_a == cleaned_b else "NO")

if __name__ == "__main__":
    main()

Test with Your Sample Input #

If you input:

abcde<<
abcd<e<

• inputA gets processed to abcd (the two < remove the last two characters)
• inputB gets processed to abcd (first < removes d, second removes e)
  The program will output YES, just like your example expects.

Notes for Other Languages #

If you're using C/C++ or Java, the core logic stays the same:

1. Read the two input strings properly (watch out for whitespace/newlines!)
2. Call your existing processing function on each string
3. Compare the results and print YES/NO accordingly

内容的提问来源于stack exchange，提问作者justoneday