为什么我的代码会立即跳转到其他地方？

Question

#include <stdio.h>
int printMenu(int);
int studentglobal;
float getCarryMark(float);
float cm1;


main()
{
    printf("-----------------------------------------------------\n");
    printf("\t\tTotal Score calculator\n");
    printf("-----------------------------------------------------\n");
    int counter, x, studentcount = 1,sum = 0 ;

    x = printMenu(studentglobal);

    for (counter = 0; counter < x; counter++)

    {
        studentcount = studentcount + counter;
        printf("Student : %d \n", studentcount);
        getCarryMark(cm1);

        if (cm1 >= 0 && cm1 <= 50)
        {
            printf("right range!!\n");
        }
        else
        {
            printf("INVALID RANGE!!!\n");
        }
        printf("%.2f\n", cm1);
    }

}

int printMenu(int nstudent)
{
    printf("Enter no of student: ");
    scanf("%d", &nstudent);
    return(nstudent);
}

float getCarryMark(float carrymark)
{
    printf("Enter your carrymarks: ");
    scanf("%f", &carrymark);
    return(carrymark);
}

所以实际上当我输入200时，它显示了INVALID RANGE!!! ，但是当我输入20时，它仍然显示INVALID RANGE!!! 。 它以某种方式跳过了if语句。 如果我有任何错误请告诉我，请不要打扰另一部分。 ert gf dfg dgd dg dfgd gd dg dg dgdfg

Answer 1

您需要从getCarryMark返回进位标记：

float getCarryMark(float carrymark)
{
    printf("Enter your carrymarks: ");
    scanf("%f", &carrymark);
    return(carrymark);
}

Answer 2

您缺少getCarryMarks方法中的return语句！

Answer 3

您错过了getCarryMark中的return语句

Answer 4

getCarryMark函数按值获取参数，修改值并将其返回，但是，从不使用返回的值。 修改参数的值不会将此更改反映到外部，因为它已按值传递。

我已经部分更新了代码，以便可以执行if语句。 请尝试以下代码。

#include <stdio.h>
int printMenu(int);
int studentglobal;
float getCarryMark(float);
float cm1;


main()
{
    printf("-----------------------------------------------------\n");
    printf("\t\tTotal Score calculator\n");
    printf("-----------------------------------------------------\n");
    int counter, x, studentcount = 1,sum = 0 ;

    x = printMenu(studentglobal);

    for (counter = 0; counter < x; counter++)

    {
        studentcount = studentcount + counter;
        printf("Student : %d \n", studentcount);
        cm1 = getCarryMark();

        if (cm1 >= 0 && cm1 <= 50)
        {
            printf("right range!!\n");
        }
        else
        {
            printf("INVALID RANGE!!!\n");
        }
        printf("%.2f\n", cm1);
    }

}

int printMenu(int nstudent)
{
    printf("Enter no of student: ");
    scanf("%d", &nstudent);
    return(nstudent);
}

float getCarryMark()
{
    float carrymark = 0.0;

    printf("Enter your carrymarks: ");
    scanf("%f", &carrymark);
    return(carrymark);
}