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来自多个函数的一些返回值与预期值不同

发布于 2025-02-11 17:05:37 字数 4740 浏览 1 评论 0原文

我有这个程序基本上可以计算学生的期中年级。它使用户可以输入相应活动的等级。然后，使用用户的输入，它计算座椅作品，作业，实验室活动，测验和考试的平均值。所有这些计算的平均值用于计算中期等级。

因此，我在此中使用了数组和功能。

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

#define TOTAL_ASSIGNMENTS 3
#define TOTAL_SEATWORKS 2
#define TOTAL_LAB_ACT 3
#define TOTAL_QUIZZES 2

float assignment(float);
float seatwork(float);
float labActivity(float);
float quiz(float);
float longQuiz(float);
float midterms(float);
float classStanding(float);

int main()
{
    int studentYear;
    float assignAverage, swAverage, labActivityAverage, qAverage, lq, mt;
    char studentNum[20], studentName[20], studentCourse[20];

    printf("\n STUDENT NUMBER: ");
    gets(&studentNum);
    printf(" STUDENT NAME: ");
    gets(&studentName);
    printf(" COURSE: ");
    gets(&studentCourse);
    printf(" YEAR: ");
    scanf("%i", &studentYear);

    printf("\n");

    assignAverage = assignment(assignAverage);
    printf("\n");
    swAverage = seatwork(swAverage);
    printf("\n");
    labActivityAverage = labActivity(labActivityAverage);
    printf("\n");
    qAverage = quiz(qAverage);
    printf("\n");
    lq = longQuiz(lq);
    printf("\n");
    mt = midterms(mt);
    printf("\n");

    printf("\n ========================================");

    printf("\n STUDENT NUMBER: %s", studentNum);
    printf("\n STUDENT NAME: %s", studentName);
    printf("\n COURSE: %s", studentName);
    printf("\n YEAR: %i", studentYear);

    printf("\n \n \t ASSIGNMENT AVERAGE: %.2f", assignAverage);
    printf("\n \t SEATWORK AVERAGE: %.2f", swAverage);
    printf("\n \t LAB ACTIVITIES AVERAGE: %.2f", labActivityAverage);
    printf("\n \t QUIZZES AVERAGE: %.2f", qAverage);
    printf("\n \t LONG QUIZ: %.2f", lq);

    float cs = (float) assignAverage + (float) swAverage + (float) labActivityAverage + (float) qAverage + (float)lq;
    cs = cs * 0.60; 
    printf("\n \n \t CLASS STANDING: %.2f", cs);
    printf("\n \t MIDTERM EXAM GRADE: %.2f", mt);
    float midtermGrade = (float) cs +  (float) mt;
    printf("\n \n \t MIDTERM GRADE: %.2f", midtermGrade);

    printf("\n ======================================== \n");

}

float assignment(float assignAverage)
{
    float sum, assign[TOTAL_ASSIGNMENTS];

    for (int i = 0; i < TOTAL_ASSIGNMENTS; i++)
    {
        printf("\t ASSIGNMENT #%i GRADE: ", i + 1);
        scanf("%f", &assign[i]);
        sum += assign[i];
    }

    assignAverage = sum / TOTAL_ASSIGNMENTS;
    assignAverage = assignAverage * 0.10;

    return assignAverage;
}

float seatwork(float swAverage)
{
    float sum, sw[TOTAL_SEATWORKS];

    for (int i = 0; i < TOTAL_SEATWORKS; i++)
    {
        printf(" \t SEATWORK #%i SCORE: ", i + 1);
        scanf("%f", &sw[i]);
        sum += sw[i];
    }

    swAverage = sum / TOTAL_SEATWORKS;
    swAverage = swAverage * 0.15;

    return swAverage;
}

float labActivity(float labActivityAverage)
{
    float sum, labAct[TOTAL_LAB_ACT];

    for (int i = 0; i < TOTAL_LAB_ACT; i++)
    {
        printf("\t LABORATORY ACTIVITY #%i GRADE: ", i + 1);
        scanf("%f", &labAct[i]);
        sum += labAct[i];
    }

    labActivityAverage = sum / TOTAL_LAB_ACT;
    labActivityAverage = labActivityAverage * 0.25;

    return labActivityAverage;
}

float quiz(float qAverage)
{
    int i;
    float sum, q[TOTAL_QUIZZES];

    for (i = 0; i < TOTAL_QUIZZES; i++)
    {
        printf("\t QUIZ #%i SCORE: ", i + 1);
        scanf("%f", &q[i]);
        sum += q[i];
    }

    qAverage = sum / TOTAL_QUIZZES;
    qAverage = qAverage * 0.20;

    return qAverage;
}

float longQuiz(float lq)
{
    printf("\t LONG QUIZ SCORE: ");
    scanf("%f", &lq);

    lq = lq * 0.30;

    return lq;
}

float midterms(float mt)
{
    printf(" \t MIDTERMS EXAMS SCORE: ");
    scanf("%f", &mt);

    mt = mt * 0.40;

    return mt;
}

打印的一些值是正确的。但是，有些人没有特别是座椅平均水平，实验室活动的平均水平，班级站立和中期等级。

预期的输出应该是：

STUDENT NUMBER: 1234
STUDENT NAME: HARRY
COURSE: BETCPET
YEAR: 1
     ASSIGNMENT AVERAGE: 9.90
     SEATWORK AVERAGE: 13.80
     LAB ACTIVITIES AVERAGE: 24.00
     QUIZZES AVERAGE: 18.40
     LONG QUIZ: 29.40

     CLASS STANDING: 57.30
     MIDTERM EXAM GRADE: 39.60

     MIDTERM GRADE: 96.30

但是它将其打印出来。座椅平均水平，平均实验室活动，班级站立和中期等级远非应该输出。

STUDENT NUMBER: 1234
STUDENT NAME: HARRY
COURSE: BETCPET
YEAR: 1
     ASSIGNMENT AVERAGE: 9.90
     SEATWORK AVERAGE: 36.15
     LAB ACTIVITIES AVERAGE: 64.17
     QUIZZES AVERAGE: 18.50
     LONG QUIZ: 29.40

     CLASS STANDING: 94.87
     MIDTERM EXAM GRADE: 39.60

     MIDTERM GRADE: 134.47

正如您在我的源代码中看到的那样，我使用了相同的方式来计算座椅，分配，实验室活动和测验的平均值。我不知道他们的平均水平与应该的平均水平有何不同。

功能中的问题吗？还是我如何称呼功能的方式？

原文

I have this program that basically calculates the student's midterm grade. It lets the user to input the grades for corresponding activities. Then, with the inputs from the user, it computes the average for seat works, assignments, lab activities, quizzes, and exams. All of these computed averages are used to compute the midterm grade.

So I used arrays and function in this.

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

#define TOTAL_ASSIGNMENTS 3
#define TOTAL_SEATWORKS 2
#define TOTAL_LAB_ACT 3
#define TOTAL_QUIZZES 2

float assignment(float);
float seatwork(float);
float labActivity(float);
float quiz(float);
float longQuiz(float);
float midterms(float);
float classStanding(float);

int main()
{
    int studentYear;
    float assignAverage, swAverage, labActivityAverage, qAverage, lq, mt;
    char studentNum[20], studentName[20], studentCourse[20];

    printf("\n STUDENT NUMBER: ");
    gets(&studentNum);
    printf(" STUDENT NAME: ");
    gets(&studentName);
    printf(" COURSE: ");
    gets(&studentCourse);
    printf(" YEAR: ");
    scanf("%i", &studentYear);

    printf("\n");

    assignAverage = assignment(assignAverage);
    printf("\n");
    swAverage = seatwork(swAverage);
    printf("\n");
    labActivityAverage = labActivity(labActivityAverage);
    printf("\n");
    qAverage = quiz(qAverage);
    printf("\n");
    lq = longQuiz(lq);
    printf("\n");
    mt = midterms(mt);
    printf("\n");

    printf("\n ========================================");

    printf("\n STUDENT NUMBER: %s", studentNum);
    printf("\n STUDENT NAME: %s", studentName);
    printf("\n COURSE: %s", studentName);
    printf("\n YEAR: %i", studentYear);

    printf("\n \n \t ASSIGNMENT AVERAGE: %.2f", assignAverage);
    printf("\n \t SEATWORK AVERAGE: %.2f", swAverage);
    printf("\n \t LAB ACTIVITIES AVERAGE: %.2f", labActivityAverage);
    printf("\n \t QUIZZES AVERAGE: %.2f", qAverage);
    printf("\n \t LONG QUIZ: %.2f", lq);

    float cs = (float) assignAverage + (float) swAverage + (float) labActivityAverage + (float) qAverage + (float)lq;
    cs = cs * 0.60; 
    printf("\n \n \t CLASS STANDING: %.2f", cs);
    printf("\n \t MIDTERM EXAM GRADE: %.2f", mt);
    float midtermGrade = (float) cs +  (float) mt;
    printf("\n \n \t MIDTERM GRADE: %.2f", midtermGrade);

    printf("\n ======================================== \n");

}

float assignment(float assignAverage)
{
    float sum, assign[TOTAL_ASSIGNMENTS];

    for (int i = 0; i < TOTAL_ASSIGNMENTS; i++)
    {
        printf("\t ASSIGNMENT #%i GRADE: ", i + 1);
        scanf("%f", &assign[i]);
        sum += assign[i];
    }

    assignAverage = sum / TOTAL_ASSIGNMENTS;
    assignAverage = assignAverage * 0.10;

    return assignAverage;
}

float seatwork(float swAverage)
{
    float sum, sw[TOTAL_SEATWORKS];

    for (int i = 0; i < TOTAL_SEATWORKS; i++)
    {
        printf(" \t SEATWORK #%i SCORE: ", i + 1);
        scanf("%f", &sw[i]);
        sum += sw[i];
    }

    swAverage = sum / TOTAL_SEATWORKS;
    swAverage = swAverage * 0.15;

    return swAverage;
}

float labActivity(float labActivityAverage)
{
    float sum, labAct[TOTAL_LAB_ACT];

    for (int i = 0; i < TOTAL_LAB_ACT; i++)
    {
        printf("\t LABORATORY ACTIVITY #%i GRADE: ", i + 1);
        scanf("%f", &labAct[i]);
        sum += labAct[i];
    }

    labActivityAverage = sum / TOTAL_LAB_ACT;
    labActivityAverage = labActivityAverage * 0.25;

    return labActivityAverage;
}

float quiz(float qAverage)
{
    int i;
    float sum, q[TOTAL_QUIZZES];

    for (i = 0; i < TOTAL_QUIZZES; i++)
    {
        printf("\t QUIZ #%i SCORE: ", i + 1);
        scanf("%f", &q[i]);
        sum += q[i];
    }

    qAverage = sum / TOTAL_QUIZZES;
    qAverage = qAverage * 0.20;

    return qAverage;
}

float longQuiz(float lq)
{
    printf("\t LONG QUIZ SCORE: ");
    scanf("%f", &lq);

    lq = lq * 0.30;

    return lq;
}

float midterms(float mt)
{
    printf(" \t MIDTERMS EXAMS SCORE: ");
    scanf("%f", &mt);

    mt = mt * 0.40;

    return mt;
}

Some of the values printed are correct. But there are some that don't, specifically the SEATWORK AVERAGE, LAB ACTIVITIES AVERAGE, CLASS STANDING, and the MIDTERM GRADE.

The expected output should be:

STUDENT NUMBER: 1234
STUDENT NAME: HARRY
COURSE: BETCPET
YEAR: 1
     ASSIGNMENT AVERAGE: 9.90
     SEATWORK AVERAGE: 13.80
     LAB ACTIVITIES AVERAGE: 24.00
     QUIZZES AVERAGE: 18.40
     LONG QUIZ: 29.40

     CLASS STANDING: 57.30
     MIDTERM EXAM GRADE: 39.60

     MIDTERM GRADE: 96.30

But it instead prints this out. The SEATWORK AVERAGE, LAB ACTIVITIES AVERAGE, CLASS STANDING, and MIDTERM GRADE are far from their supposed to be output.

STUDENT NUMBER: 1234
STUDENT NAME: HARRY
COURSE: BETCPET
YEAR: 1
     ASSIGNMENT AVERAGE: 9.90
     SEATWORK AVERAGE: 36.15
     LAB ACTIVITIES AVERAGE: 64.17
     QUIZZES AVERAGE: 18.50
     LONG QUIZ: 29.40

     CLASS STANDING: 94.87
     MIDTERM EXAM GRADE: 39.60

     MIDTERM GRADE: 134.47

As you can see in my source code, I used the same way of calculating the averages for the seatwork, assignment, lab activities, and quizzes. I don't get how their average is different from what it's supposed to be.

Is the problem in the functions? Or the way how I call the functions?

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猫腻 2025-02-18 17:05:37
#include <stdio.h>
#include <stdlib.h>

#define MAX_INPUT 20
#define TOTAL_ASSIGNMENTS 3
#define TOTAL_SEATWORKS 2
#define TOTAL_LAB_ACT 3
#define TOTAL_QUIZZES 2

void assignment(float *assignAverage);
void seatwork(float *swAverage);
void labActivity(float *labActivityAverage);
void quiz(float *qAverage);
void longQuiz(float *lq);
void midterms(float *mt);
void classStanding(float *computedClassStanding);

int main()
{
    char studentNum[MAX_INPUT], studentName[MAX_INPUT], studentCourse[MAX_INPUT];
    int studentYear;
    float ass = 0, sw = 0, labAct = 0, q = 0, longq = 0, midt = 0, cs = 0, midtermGrade = 0;

    printf("\n STUDENT NUMBER: ");
    fgets(studentNum, MAX_INPUT, stdin);
    printf(" STUDENT NAME: ");
    fgets(studentName, MAX_INPUT, stdin);
    printf(" COURSE: ");
    fgets(studentCourse, MAX_INPUT, stdin);
    printf(" YEAR: ");
    scanf("%i", &studentYear);

    printf("\n");

    assignment(&ass);
    printf("\n");
    seatwork(&sw);
    printf("\n");
    labActivity(&labAct);
    printf("\n");
    quiz(&q);
    printf("\n");
    longQuiz(&longq);
    printf("\n");
    midterms(&midt);

    cs = (float) ass + (float) sw + (float) labAct + (float) q + (float)longq;
    cs = cs * 0.60;

    midtermGrade = (float) cs +  (float) midt;


    printf("\n ======================================== \n");

    printf(" STUDENT NUMBER: %s", studentNum);
    printf(" STUDENT NAME: %s", studentName);
    printf(" COURSE: %s", studentName);
    printf(" YEAR: %i", studentYear);

    printf("\n \t ASSIGNMENT AVERAGE: %.2f ", ass);
    printf("\n \t SEATWORK AVERAGE: %.2f ", sw);
    printf("\n \t LABORATORY ACTIVITY AVERAGE: %.2f ", labAct);
    printf("\n \t QUIZZES AVERAGE: %.2f", q);
    printf("\n \t LONG QUIZ: %.2f", longq);

    printf("\n \n \t CLASS STANDING: %.2f", cs);
    printf("\n \t MIDTERM EXAM GRADE: %.2f", midt);

    printf("\n \n \t MIDTERM GRADE: %.2f", midtermGrade);

    printf("\n ======================================== \n");

    return 0;
}

void assignment(float *assignAverage)
{
    float assign[TOTAL_ASSIGNMENTS], sum = 0;

    for (int i = 0; i < TOTAL_ASSIGNMENTS; i++)
    {
        printf("\t ASSIGNMENT #%i GRADE: ", i + 1);
        scanf("%f", &assign[i]);
        sum += assign[i];
    }

    *assignAverage = sum / TOTAL_ASSIGNMENTS;
    *assignAverage = *assignAverage * 0.10;

    return;
}

void seatwork(float *swAverage)
{
    float sum = 0, sw[TOTAL_SEATWORKS];

    for (int i = 0; i < TOTAL_SEATWORKS; i++)
    {
        printf(" \t SEATWORK #%i SCORE: ", i + 1);
        scanf("%f", &sw[i]);
        sum += sw[i];
    }

    *swAverage = sum / TOTAL_SEATWORKS;
    *swAverage = *swAverage * 0.15;

    return;
}

void labActivity(float *labActivityAverage)
{
    float sum = 0, labAct[TOTAL_LAB_ACT];

    for (int i = 0; i < TOTAL_LAB_ACT; i++)
    {
        printf("\t LABORATORY ACTIVITY #%i GRADE: ", i + 1);
        scanf("%f", &labAct[i]);
        sum += labAct[i];
    }

    *labActivityAverage = sum / TOTAL_LAB_ACT;
    *labActivityAverage = *labActivityAverage * 0.25;

    return;
}

void quiz(float *qAverage)
{
    float sum = 0, q[TOTAL_QUIZZES];

    for (int i = 0; i < TOTAL_QUIZZES; i++)
    {
        printf("\t QUIZ #%i SCORE: ", i + 1);
        scanf("%f", &q[i]);
        sum += q[i];
    }

    *qAverage = sum / TOTAL_QUIZZES;
    *qAverage = *qAverage * 0.20;

    return;
}

void longQuiz(float *lq)
{
    float longQuizScore = 0;
    printf("\t LONG QUIZ SCORE: ");
    scanf("%f", &longQuizScore);

    *lq = longQuizScore * 0.30;

    return;
}

void midterms(float *mt)
{
    float mtExamScore = 0;
    printf(" \t MIDTERMS EXAMS SCORE: ");
    scanf("%f", &mtExamScore);

    *mt = mtExamScore * 0.40;

    return;
}

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

#define MAX_INPUT 20
#define TOTAL_ASSIGNMENTS 3
#define TOTAL_SEATWORKS 2
#define TOTAL_LAB_ACT 3
#define TOTAL_QUIZZES 2

void assignment(float *assignAverage);
void seatwork(float *swAverage);
void labActivity(float *labActivityAverage);
void quiz(float *qAverage);
void longQuiz(float *lq);
void midterms(float *mt);
void classStanding(float *computedClassStanding);

int main()
{
    char studentNum[MAX_INPUT], studentName[MAX_INPUT], studentCourse[MAX_INPUT];
    int studentYear;
    float ass = 0, sw = 0, labAct = 0, q = 0, longq = 0, midt = 0, cs = 0, midtermGrade = 0;

    printf("\n STUDENT NUMBER: ");
    fgets(studentNum, MAX_INPUT, stdin);
    printf(" STUDENT NAME: ");
    fgets(studentName, MAX_INPUT, stdin);
    printf(" COURSE: ");
    fgets(studentCourse, MAX_INPUT, stdin);
    printf(" YEAR: ");
    scanf("%i", &studentYear);

    printf("\n");

    assignment(&ass);
    printf("\n");
    seatwork(&sw);
    printf("\n");
    labActivity(&labAct);
    printf("\n");
    quiz(&q);
    printf("\n");
    longQuiz(&longq);
    printf("\n");
    midterms(&midt);

    cs = (float) ass + (float) sw + (float) labAct + (float) q + (float)longq;
    cs = cs * 0.60;

    midtermGrade = (float) cs +  (float) midt;


    printf("\n ======================================== \n");

    printf(" STUDENT NUMBER: %s", studentNum);
    printf(" STUDENT NAME: %s", studentName);
    printf(" COURSE: %s", studentName);
    printf(" YEAR: %i", studentYear);

    printf("\n \t ASSIGNMENT AVERAGE: %.2f ", ass);
    printf("\n \t SEATWORK AVERAGE: %.2f ", sw);
    printf("\n \t LABORATORY ACTIVITY AVERAGE: %.2f ", labAct);
    printf("\n \t QUIZZES AVERAGE: %.2f", q);
    printf("\n \t LONG QUIZ: %.2f", longq);

    printf("\n \n \t CLASS STANDING: %.2f", cs);
    printf("\n \t MIDTERM EXAM GRADE: %.2f", midt);

    printf("\n \n \t MIDTERM GRADE: %.2f", midtermGrade);

    printf("\n ======================================== \n");

    return 0;
}

void assignment(float *assignAverage)
{
    float assign[TOTAL_ASSIGNMENTS], sum = 0;

    for (int i = 0; i < TOTAL_ASSIGNMENTS; i++)
    {
        printf("\t ASSIGNMENT #%i GRADE: ", i + 1);
        scanf("%f", &assign[i]);
        sum += assign[i];
    }

    *assignAverage = sum / TOTAL_ASSIGNMENTS;
    *assignAverage = *assignAverage * 0.10;

    return;
}

void seatwork(float *swAverage)
{
    float sum = 0, sw[TOTAL_SEATWORKS];

    for (int i = 0; i < TOTAL_SEATWORKS; i++)
    {
        printf(" \t SEATWORK #%i SCORE: ", i + 1);
        scanf("%f", &sw[i]);
        sum += sw[i];
    }

    *swAverage = sum / TOTAL_SEATWORKS;
    *swAverage = *swAverage * 0.15;

    return;
}

void labActivity(float *labActivityAverage)
{
    float sum = 0, labAct[TOTAL_LAB_ACT];

    for (int i = 0; i < TOTAL_LAB_ACT; i++)
    {
        printf("\t LABORATORY ACTIVITY #%i GRADE: ", i + 1);
        scanf("%f", &labAct[i]);
        sum += labAct[i];
    }

    *labActivityAverage = sum / TOTAL_LAB_ACT;
    *labActivityAverage = *labActivityAverage * 0.25;

    return;
}

void quiz(float *qAverage)
{
    float sum = 0, q[TOTAL_QUIZZES];

    for (int i = 0; i < TOTAL_QUIZZES; i++)
    {
        printf("\t QUIZ #%i SCORE: ", i + 1);
        scanf("%f", &q[i]);
        sum += q[i];
    }

    *qAverage = sum / TOTAL_QUIZZES;
    *qAverage = *qAverage * 0.20;

    return;
}

void longQuiz(float *lq)
{
    float longQuizScore = 0;
    printf("\t LONG QUIZ SCORE: ");
    scanf("%f", &longQuizScore);

    *lq = longQuizScore * 0.30;

    return;
}

void midterms(float *mt)
{
    float mtExamScore = 0;
    printf(" \t MIDTERMS EXAMS SCORE: ");
    scanf("%f", &mtExamScore);

    *mt = mtExamScore * 0.40;

    return;
}
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