为什么删除和重命名在我的代码中不起作用

Question

案例2是有问题的部分。最后，它应该删除文件＆＃34; List.txt＆＃34;并重命名文件＆＃34; newlist.txt＆＃34;到＆＃34; List.txt＆＃34;但这些都不会发生，并且两个函数都返回-1，因此两个文件在执行后都保留在目录中。

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

int main() 
{
    char menu, firstName[20], lastName[30], stdNum[10], avgInt[3], avgDec[3];
    do
    {
        FILE *listPtr;
        printf("Menu: \n1 : Add a new student\n2 : Remove a student\n3 : Edit a student\n4 : Search a student\n5 : Sort the students\n6 : Exit\n\n");   
        menu = getch();
        if(menu != 6)
            switch(menu)
            {
                case '1':
                {
                    listPtr = fopen("List.txt", "a");

                    //first name
                    printf("Enter the first name:\n");
                    scanf("%19s", firstName);
                    fprintf(listPtr, firstName);
                    fputc(' ', listPtr);

                    //last name
                    printf("\nEnter the last name:\n");
                    scanf("%29s", lastName);
                    fprintf(listPtr, lastName);
                    fputc(' ', listPtr);

                    //student number
                    printf("\nEnter the student number:\n");
                    scanf("%9s", stdNum);
                    fprintf(listPtr, stdNum);
                    fputc(' ', listPtr);

                    //average
                    printf("\nEnter the student's average score:\n");
                    printf("Integer part:");
                    scanf("%s", avgInt);
                    fprintf(listPtr, avgInt);
                    fputc(' ', listPtr);
                    printf("Decimal part:");
                    scanf("%s", avgDec);
                    fprintf(listPtr, avgDec);
                    fputc('\n', listPtr);
                    fclose(listPtr);
                    break;
                }
                case '2':
                {
                    listPtr = fopen ("List.txt", "r");
                    if(feof(listPtr))
                        printf("You haven't saved any students yet.");
                    else
                    {
                        int found = 0;
                        listPtr = fopen("list.txt", "r");
                        printf("Enter the student's student number:");
                        char tempNum[10];
                        scanf("%s", tempNum);
                        do
                        {
                            fscanf(listPtr, "%s %s %s %s %s", firstName, lastName, stdNum,     avgInt,avgDec);
                        if(strcmp(tempNum, stdNum) == 0)
                        {
                            found = 1;
                            break;  
                        }
                        } while(strcmp(tempNum, stdNum) != 0 && !feof(listPtr));
                        if(found == 0)
                            printf("This student doesn't exist in the list.");
                        else
                        {
                            rewind(listPtr);
                            FILE *tempList;
                            tempList = fopen("newlist.txt", "w");
                            while(!feof(listPtr))
                            {
                                fscanf(listPtr, "%s %s %s %s %s", firstName, lastName, stdNum,     avgInt, avgDec); 
                                if(strcmp(tempNum, stdNum) != 0 && !feof(listPtr))
                                    fprintf(tempList, "%s %s %s %s %s\n", firstName, lastName, stdNum, avgInt, avgDec);
                            }
                            fclose(listPtr);
                            fclose(tempList);
                            remove("List.txt");
                            rename("newlist.txt", "List.txt");
                        }
                    }
                    break;
                }
                case '3':

                    break;
                case '4':

                    break;
                case '5':   

                    break;
            }
    } while(menu != '6');
}