C语言实现的数学测试程序：生成随机题目并评判答案

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

// 生成随机整数 int getRandomInt(int min, int max) { return rand() % (max - min + 1) + min; }

// 生成加法题目 void generateAdditionQuestion() { int operand1 = getRandomInt(0, 99); int operand2 = getRandomInt(0, 99); printf("%d + %d = \n", operand1, operand2); }

// 生成减法题目 void generateSubtractionQuestion() { int operand1 = getRandomInt(0, 99); int operand2 = getRandomInt(0, operand1); printf("%d - %d = \n", operand1, operand2); }

// 生成乘法题目 void generateMultiplicationQuestion() { int operand1 = getRandomInt(0, 9); int operand2 = getRandomInt(0, 9); printf("%d * %d = \n", operand1, operand2); }

// 生成除法题目 void generateDivisionQuestion() { int operand2 = getRandomInt(1, 9); int result = getRandomInt(0, 9); int operand1 = operand2 * result + getRandomInt(0, operand2 - 1); printf("%d / %d = \n", operand1, operand2); }

// 学生回答题目 void answerQuestion() { int answer; scanf("%d", &answer); printf("Your answer is %d\n", answer); }

// 判断答案是否正确 int isAnswerCorrect(int operand1, int operand2, char operator, int answer) { int result; switch (operator) { case '+': result = operand1 + operand2; break; case '-': result = operand1 - operand2; break; case '*': result = operand1 * operand2; break; case '/': result = operand1 / operand2; break; } return result == answer; }

int main() { // 设置随机数种子 srand(time(0));

int numQuestions;
printf("Enter the number of questions: ");
scanf("%d", &numQuestions);

int addCount = getRandomInt(1, numQuestions - 3);
int subCount = getRandomInt(1, numQuestions - addCount - 2);
int mulCount = getRandomInt(1, numQuestions - addCount - subCount - 1);
int divCount = numQuestions - addCount - subCount - mulCount;

printf("Generating %d addition questions...\n", addCount);
for (int i = 0; i < addCount; i++) {
    generateAdditionQuestion();
}

printf("Generating %d subtraction questions...\n", subCount);
for (int i = 0; i < subCount; i++) {
    generateSubtractionQuestion();
}

printf("Generating %d multiplication questions...\n", mulCount);
for (int i = 0; i < mulCount; i++) {
    generateMultiplicationQuestion();
}

printf("Generating %d division questions...\n", divCount);
for (int i = 0; i < divCount; i++) {
    generateDivisionQuestion();
}

printf("Starting the test...\n");

int totalScore = 0;
int addScore = 0, subScore = 0, mulScore = 0, divScore = 0;

// 第一个学生答题
printf("Student 1:\n");
for (int i = 0; i < numQuestions; i++) {
    int operand1, operand2, answer;
    char operator;
    scanf("%d %c %d = %d", &operand1, &operator, &operand2, &answer);
    if (isAnswerCorrect(operand1, operand2, operator, answer)) {
        printf("Q%d: Correct\n", i + 1);
        totalScore++;
        switch (operator) {
            case '+':
                addScore++;
                break;
            case '-':
                subScore++;
                break;
            case '*':
                mulScore++;
                break;
            case '/':
                divScore++;
                break;
        }
    } else {
        printf("Q%d: Incorrect\n", i + 1);
    }
}

// 第二个学生答题
printf("Student 2:\n");
for (int i = 0; i < numQuestions; i++) {
    int operand1, operand2, answer;
    char operator;
    scanf("%d %c %d = %d", &operand1, &operator, &operand2, &answer);
    if (isAnswerCorrect(operand1, operand2, operator, answer)) {
        printf("Q%d: Correct\n", i + 1);
        totalScore++;
        switch (operator) {
            case '+':
                addScore++;
                break;
            case '-':
                subScore++;
                break;
            case '*':
                mulScore++;
                break;
            case '/':
                divScore++;
                break;
        }
    } else {
        printf("Q%d: Incorrect\n", i + 1);
    }
}

printf("Test finished\n");
printf("Total score: %d/%d\n", totalScore, numQuestions);
printf("Addition score: %d/%d\n", addScore, addCount);
printf("Subtraction score: %d/%d\n", subScore, subCount);
printf("Multiplication score: %d/%d\n", mulScore, mulCount);
printf("Division score: %d/%d\n", divScore, divCount);

return 0;

}