#include<stdio.h> int main(){ int i=0,k=0,s; char ch[80]; while((ch[k]=getchar())!='\n') k++; ch[k]='\n'; s=k; for(k=0;k<s/2;k++){ if(ch[k]!=ch[s-1-k]){ for(int i=0;i<s;i++) printf("%c",ch[i]); printf("\n"); printf("No"); } else(ch[k]==ch[s-1-k]);{ for(i=0;i<s;i++) printf("%c",ch[i]); printf("\n"); printf("Yes"); } }return 0; }

这段代码是一个判断回文字符串的程序。用户输入一行字符串，程序会判断该字符串是否是回文字符串（即正向和反向拼写都一样）。如果是回文字符串，则输出 "Yes"，否则输出 "No"。

程序中使用了一个字符数组 ch 来存储用户输入的字符串，使用变量 k 来记录输入的字符串的长度。程序中通过循环遍历 ch 数组，判断字符串是否是回文字符串。如果不是回文字符串，则直接输出 "No" 并退出程序；如果是回文字符串，则直接输出 "Yes" 并退出程序。

需要注意的是，程序中有一个小错误，即在第 16 行的 else 后面多了一对花括号，应该将它删除。

相关问题

1.创建文件夹： #include <sys/types.h> #include <sys/stat.h> #include <unistd.h> #include <iostream> using namespace std; int main() { string folder_name = "new_folder"; mkdir(folder_name.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH); //创建文件夹 return 0; } 2.复制文件： #include <stdio.h> #include <stdlib.h> int main() { FILE *fp1, *fp2; //定义两个文件指针 char ch; fp1 = fopen("file1.txt", "r"); //打开要复制的文件 fp2 = fopen("file2.txt", "w"); //打开要复制到的文件 while ((ch = fgetc(fp1)) != EOF) { fputc(ch, fp2); //复制文件 } fclose(fp1); fclose(fp2); return 0; } 3.移动文件： #include <stdio.h> #include <stdlib.h> int main() { char old_path[100] = "old_folder/file1.txt"; char new_path[100] = "new_folder/file1.txt"; int result = rename(old_path, new_path); //移动文件 if (result == 0) { printf("移动成功\n"); } else { printf("移动失败\n"); } return 0; } 4.删除文件夹： #include <unistd.h> #include <stdio.h> int main() { char folder_name[100] = "new_folder"; int result = rmdir(folder_name); //删除文件夹 if (result == 0) { printf("删除成功\n"); } else { printf("删除失败\n"); } return 0; } 5.显示文件夹中的内容： #include <dirent.h> #include <stdio.h> int main() { DIR *dir; struct dirent *ent; char folder_name[100] = "new_folder"; dir = opendir(folder_name); //打开文件夹 while ((ent = readdir(dir)) != NULL) { printf("%s\n", ent->d_name); //遍历文件夹中的文件 } closedir(dir); return 0; } 6.查看文件内容： #include <stdio.h> int main() { FILE *fp; char ch; fp = fopen("file1.txt", "r"); //打开文件 while ((ch = fgetc(fp)) != EOF) { printf("%c", ch); //输出文件内容 } fclose(fp); return 0; } 7.修改文件权限： #include <sys/stat.h> #include <stdio.h> int main() { char file_name[100] = "file1.txt"; chmod(file_name, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); //修改文件权限 return 0; } 8.搜索文件： #include <dirent.h> #include <stdio.h> #include <string.h> int main() { DIR *dir; struct dirent *ent; char folder_name[100] = "new_folder"; char search_name[100] = "file1.txt"; dir = opendir(folder_name); //打开文件夹 while ((ent = readdir(dir)) != NULL) { if (strcmp(ent->d_name, search_name) == 0) //搜索文件 { printf("找到文件：%s\n", ent->d_name); break; } } closedir(dir); return 0; }将上述代码整合成一个完整的程序代码

以下是整合后的完整代码：

#include <iostream>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>

using namespace std;

int createFolder(string folder_name) {
    int result = mkdir(folder_name.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH); //创建文件夹
    if (result == 0) {
        cout << "创建文件夹成功" << endl;
    } else {
        cout << "创建文件夹失败" << endl;
    }
    return result;
}

int copyFile(char* old_path, char* new_path) {
    FILE *fp1, *fp2; //定义两个文件指针
    char ch;
    fp1 = fopen(old_path, "r"); //打开要复制的文件
    fp2 = fopen(new_path, "w"); //打开要复制到的文件
    if (fp1 == NULL || fp2 == NULL) {
        cout << "打开文件失败" << endl;
        return -1;
    }
    while ((ch = fgetc(fp1)) != EOF) {
        fputc(ch, fp2); //复制文件
    }
    fclose(fp1);
    fclose(fp2);
    return 0;
}

int moveFile(char* old_path, char* new_path) {
    int result = rename(old_path, new_path); //移动文件
    if (result == 0) {
        cout << "移动文件成功" << endl;
    } else {
        cout << "移动文件失败" << endl;
    }
    return result;
}

int deleteFolder(char* folder_name) {
    int result = rmdir(folder_name); //删除文件夹
    if (result == 0) {
        cout << "删除文件夹成功" << endl;
    } else {
        cout << "删除文件夹失败" << endl;
    }
    return result;
}

int displayFolder(char* folder_name) {
    DIR *dir;
    struct dirent *ent;
    dir = opendir(folder_name); //打开文件夹
    while ((ent = readdir(dir)) != NULL) {
        cout << ent->d_name << endl; //遍历文件夹中的文件
    }
    closedir(dir);
    return 0;
}

int displayFile(char* file_name) {
    FILE *fp;
    char ch;
    fp = fopen(file_name, "r"); //打开文件
    if (fp == NULL) {
        cout << "打开文件失败" << endl;
        return -1;
    }
    while ((ch = fgetc(fp)) != EOF) {
        cout << ch; //输出文件内容
    }
    fclose(fp);
    return 0;
}

int changePermission(char* file_name) {
    int result = chmod(file_name, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH); //修改文件权限
    if (result == 0) {
        cout << "修改文件权限成功" << endl;
    } else {
        cout << "修改文件权限失败" << endl;
    }
    return result;
}

int searchFile(char* folder_name, char* search_name) {
    DIR *dir;
    struct dirent *ent;
    dir = opendir(folder_name); //打开文件夹
    while ((ent = readdir(dir)) != NULL) {
        if (strcmp(ent->d_name, search_name) == 0) { //搜索文件
            cout << "找到文件：" << ent->d_name << endl;
            closedir(dir);
            return 0;
        }
    }
    cout << "未找到文件" << endl;
    closedir(dir);
    return -1;
}

int main() {
    string folder_name = "new_folder";
    char old_path[100] = "old_folder/file1.txt";
    char new_path[100] = "new_folder/file1.txt";
    char file_name[100] = "file1.txt";
    char search_name[100] = "file1.txt";
    createFolder(folder_name);
    copyFile(old_path, new_path);
    moveFile(old_path, new_path);
    deleteFolder("new_folder");
    displayFolder("new_folder");
    displayFile(file_name);
    changePermission(file_name);
    searchFile("new_folder", search_name);
    return 0;
}

Nirvana 15:38:49 #include <stdio.h> #include <conio.h> #include <stdbool.h> #define MAX_QUEUE_SIZE 1000 void main() { char queue[MAX_QUEUE_SIZE]; int front=0,rear=0; char ch; ch=getchar(); while(ch!='#') { queue[rear]=ch; rear++; ch=getchar(); } while(front<rear) { printf("%c",queue[front]); front++; } printf("\n"); getch(); } Nirvana 15:39:07 #include <stdio.h>#include <conio.h>#define MAX_STACK_MAX 1000void main(){ char stack[MAX_STACK_MAX]; int top=0,i; char ch;ch=getchar(); while (ch!='!'&&top<MAX_STACK_MAX) { switch(ch) { case'#': if(top>0) top--; break; case'@': top=0; break; default: stack[top]=ch; top++; break; } ch=getchar(); } for(i=0;i<top;i++) printf("%c",stack[i]); printf("\n"); getch();}将这两段代码合为一段代码

以下是将两段代码合并后的代码：

#include <stdio.h>
#include <conio.h>
#include <stdbool.h>

#define MAX_QUEUE_SIZE 1000
#define MAX_STACK_MAX 1000

void main() {
    char queue[MAX_QUEUE_SIZE];
    int front = 0, rear = 0;
    char stack[MAX_STACK_MAX];
    int top = 0, i;
    char ch;
    
    ch = getchar();
    while (ch != '#') {
        queue[rear] = ch;
        rear++;
        ch = getchar();
    }
    
    ch = getchar();
    while (ch != '!' && top < MAX_STACK_MAX) {
        switch(ch) {
            case '#':
                if (top > 0) {
                    top--;
                }
                break;
            case '@':
                top = 0;
                break;
            default:
                stack[top] = ch;
                top++;
                break;
        }
        ch = getchar();
    }
    
    printf("Queue output: ");
    while (front < rear) {
        printf("%c", queue[front]);
        front++;
    }
    printf("\n");
    
    printf("Stack output: ");
    for (i = 0; i < top; i++) {
        printf("%c", stack[i]);
    }
    printf("\n");
    
    getch();
}

这个合并后的代码可以分别读入字符到队列和栈中，并输出它们的内容。其中，遇到 `#` 时队列弹出元素，遇到 `@` 时栈清空。