字符串去除特定字符

刺骨的言语ヽ痛彻心扉 2021-09-11 02:08 464阅读 0赞

## 题目描述 ##

输入字符串s和字符c，要求去掉s中所有的c字符，并输出结果。

## 输入描述: ##

测试数据有多组，每组输入字符串s和字符c。

## 输出描述: ##

对于每组输入,输出去除c字符后的结果。

*  示例1
    
     *  输入  
        `heallo`  
        `a`
     *  输出  
        `hello`

#include <iostream>
    #include <fstream>
    #include <string>
    #include <ostream>
    #include <iterator>
    #include <vector>
    #include <algorithm>
    #include <map>
    #include <queue>
    #include <unordered_set>
    #include "cstring"
    
    #define N 1001
    using namespace std;
    
    int getStringLength(const char array[]) { 
        int length = 0;
        if (array == nullptr) { 
            return length;
        }
        while (array[length] != '\0') { 
            length++;
        }
        return length;
    }
    
    
    /** * 键盘输入一行数据 * @return */
    char *getLineMessage() { 
        // 预先准备的大小
        int preSize = 2;
        int len = preSize;
        int totalSize = preSize;
        char *line = static_cast<char *>(malloc(preSize * sizeof(char))), *str = line;
    
        int c;
    
        // 申请内存失败
        if (line == nullptr) { 
            return nullptr;
        }
    
        for (;;) { 
            c = fgetc(stdin);
            // 输入是终止
            if (c == EOF) { 
                break;
            }
    
            //判断是否已经用尽空间
            if (--len == 0) { 
                len = totalSize;
                totalSize = totalSize * 2;
                char *newLine = static_cast<char *>(realloc(str, totalSize));
    
                if (newLine == nullptr) { 
                    free(str);
                    return nullptr;
                }
                // 指针后移
                line = newLine + (line - str);
                str = newLine;
            }
    
            if ('\n' == (*line++ = c)) { 
                break;
            }
        }
        *(--line) = '\0';
        return str;
    }
    
    int main() { 
        char *message = getLineMessage();
        char target;
        cin >> target;
        int length = strlen(message);
        int j = 0;
        for (int i = 0; i < length; i++) { 
            if (message[i] != target) { 
                message[j++] = message[i];
            }
        }
        message[j] = '\0';
        cout << message << endl;
        return 0;
    // nwlrmqhcdarzowkkyhiddqscdxrjmowfrxsjyldefsarcynecdyggxxpklorellnmpapqfwkhopkmcoqhnwnkuewhsqmg
    // nwlrmqhcdarzowkkyhiddqscdxrjmowfrxsjyldefsarcynecdyggxxpklorellnmpapqfwkhopkmcoqhnwnkuewhsqmg
    
    }