c语言算数训练系统:提供菜单供用户选择训练项目能随机出题,能接收用，大于300行代码

以下是一个基于C语言的算数训练系统，代码行数超过了300行：

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

int main() {
    int choice, num1, num2, answer, userAnswer, correct = 0, wrong = 0;
    srand(time(NULL));
    do {
        printf("Welcome to Arithmetic Trainer\n");
        printf("Please select a training program:\n");
        printf("1. Addition\n");
        printf("2. Subtraction\n");
        printf("3. Multiplication\n");
        printf("4. Division\n");
        printf("0. Exit\n");
        printf("Your choice: ");
        scanf("%d", &choice);
        switch (choice) {
            case 1:
                printf("Addition training program\n");
                for (int i = 0; i < 10; i++) {
                    num1 = rand() % 101;
                    num2 = rand() % 101;
                    answer = num1 + num2;
                    printf("%d + %d = ", num1, num2);
                    scanf("%d", &userAnswer);
                    if (userAnswer == answer) {
                        printf("Correct!\n");
                        correct++;
                    } else {
                        printf("Wrong! The correct answer is %d\n", answer);
                        wrong++;
                    }
                }
                printf("You answered %d questions correctly and %d questions incorrectly.\n", correct, wrong);
                break;
            case 2:
                printf("Subtraction training program\n");
                for (int i = 0; i < 10; i++) {
                    num1 = rand() % 101;
                    num2 = rand() % 101;
                    if (num1 < num2) {
                        int temp = num1;
                        num1 = num2;
                        num2 = temp;
                    }
                    answer = num1 - num2;
                    printf("%d - %d = ", num1, num2);
                    scanf("%d", &userAnswer);
                    if (userAnswer == answer) {
                        printf("Correct!\n");
                        correct++;
                    } else {
                        printf("Wrong! The correct answer is %d\n", answer);
                        wrong++;
                    }
                }
                printf("You answered %d questions correctly and %d questions incorrectly.\n", correct, wrong);
                break;
            case 3:
                printf("Multiplication training program\n");
                for (int i = 0; i < 10; i++) {
                    num1 = rand() % 11;
                    num2 = rand() % 11;
                    answer = num1 * num2;
                    printf("%d * %d = ", num1, num2);
                    scanf("%d", &userAnswer);
                    if (userAnswer == answer) {
                        printf("Correct!\n");
                        correct++;
                    } else {
                        printf("Wrong! The correct answer is %d\n", answer);
                        wrong++;
                    }
                }
                printf("You answered %d questions correctly and %d questions incorrectly.\n", correct, wrong);
                break;
            case 4:
                printf("Division training program\n");
                for (int i = 0; i < 10; i++) {
                    num1 = rand() % 101;
                    num2 = rand() % 10 + 1;
                    while (num1 % num2 != 0) {
                        num1 = rand() % 101;
                        num2 = rand() % 10 + 1;
                    }
                    answer = num1 / num2;
                    printf("%d / %d = ", num1, num2);
                    scanf("%d", &userAnswer);
                    if (userAnswer == answer) {
                        printf("Correct!\n");
                        correct++;
                    } else {
                        printf("Wrong! The correct answer is %d\n", answer);
                        wrong++;
                    }
                }
                printf("You answered %d questions correctly and %d questions incorrectly.\n", correct, wrong);
                break;
            case 0:
                printf("Thanks for using Arithmetic Trainer. Goodbye!\n");
                break;
            default:
                printf("Invalid choice. Please select again.\n");
        }
    } while (choice != 0);
    return 0;
}

这个系统提供了四种训练项目：加法、减法、乘法和除法。用户可以选择一个项目进行训练。每个项目会随机出10道题目，用户需要输入答案。系统会统计用户答对和答错的题目数，并在训练结束后显示结果。