C++写一个刷题软件源码

以下是一个简单的刷题软件的示例代码：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define MAX_PROBLEMS 1000
#define MAX_NAME_LENGTH 50

typedef struct {
    char name[MAX_NAME_LENGTH];
    int solved;
} Problem;

void printMenu() {
    printf("1. 添加题目\n");
    printf("2. 显示所有题目\n");
    printf("3. 查找题目\n");
    printf("4. 标记已解决的题目\n");
    printf("5. 退出\n");
    printf("请选择操作：");
}

int readInt() {
    char buffer[256];
    fgets(buffer, sizeof(buffer), stdin);
    return atoi(buffer);
}

void clearInputBuffer() {
    int c;
    while ((c = getchar()) != '\n' && c != EOF) {}
}

void addProblem(Problem problems[], int *numProblems) {
    if (*numProblems == MAX_PROBLEMS) {
        printf("题目数量已达到最大值！\n");
        return;
    }

    printf("请输入题目名称：");
    fgets(problems[*numProblems].name, sizeof(problems[*numProblems].name), stdin);
    problems[*numProblems].name[strcspn(problems[*numProblems].name, "\n")] = '\0';
    problems[*numProblems].solved = 0;

    (*numProblems)++;
}

void printProblems(Problem problems[], int numProblems) {
    if (numProblems == 0) {
        printf("没有题目！\n");
        return;
    }

    for (int i = 0; i < numProblems; i++) {
        printf("%d. %s [%s]\n", i + 1, problems[i].name, problems[i].solved ? "已解决" : "未解决");
    }
}

void findProblem(Problem problems[], int numProblems) {
    char name[MAX_NAME_LENGTH];
    printf("请输入要查找的题目名称：");
    fgets(name, sizeof(name), stdin);
    name[strcspn(name, "\n")] = '\0';

    for (int i = 0; i < numProblems; i++) {
        if (strcmp(problems[i].name, name) == 0) {
            printf("%s [%s]\n", problems[i].name, problems[i].solved ? "已解决" : "未解决");
            return;
        }
    }

    printf("没有找到该题目！\n");
}

void markSolved(Problem problems[], int numProblems) {
    int index;
    printf("请输入题目编号：");
    index = readInt();

    if (index < 1 || index > numProblems) {
        printf("无效的题目编号！\n");
        return;
    }

    problems[index - 1].solved = 1;
    printf("已标记题目“%s”为已解决。\n", problems[index - 1].name);
}

int main() {
    Problem problems[MAX_PROBLEMS];
    int numProblems = 0;
    int choice;

    while (1) {
        printMenu();
        choice = readInt();

        switch (choice) {
            case 1:
                addProblem(problems, &numProblems);
                break;
            case 2:
                printProblems(problems, numProblems);
                break;
            case 3:
                findProblem(problems, numProblems);
                break;
            case 4:
                markSolved(problems, numProblems);
                break;
            case 5:
                printf("再见！\n");
                return 0;
            default:
                printf("无效的操作！\n");
                break;
        }

        clearInputBuffer();
    }
}

该程序使用结构体来存储题目名称和是否已解决的信息，并提供了添加、显示、查找和标记已解决等功能。用户可以通过命令行菜单进行操作。注意，这只是一个示例代码，实际的刷题软件需要更复杂的功能和界面设计。