从C编程中的不同文本文件中读取特定行

Question

好吧，所以我还在学习C编程，我想要做的是从同一文件夹中的不同文本文件中读取特定行。所以我想说的是让我说我​​想从不同的文本文件中读取名称并显示它们。我一直试图这样做但我只能一次从一个文件中读取文本

下面是我的代码

void display_medicine()
{
system("cls");

const char *fil  = "Medicines/";
const char *exec = ".txt";
char filename[50];
//snprintf(filename, sizeof filename, "%s%s%s", fil, medicineview, exec);

system("cls");
char medicinename[50];
char medavailability[20];
char companyname[100];
char dom[25];
char doe[50];
char price[20];

FILE *file;
file =fopen(filename,"r");

int num = 1;

if (file) 
{
    fgets(medicinename, sizeof(medicinename), file);

    fgets(medavailability, sizeof(medavailability), file);

    fgets(companyname, sizeof(companyname), file);

    fgets(dom, sizeof(dom), file);

    fgets(doe, sizeof(doe), file);

    fgets(price, sizeof(price),file);

    fclose(file);

    gotoxy(10,3);

    printf("================= %s VIEWING ================" "\n");

    gotoxy(14,5);
    printf("Name:\t\t\t%s", medicinename);

    gotoxy(14,7);
    printf("Availability:\t\t%s", medavailability);

    gotoxy(14,9);
    printf("Company Name:\t\t%s", companyname);

    gotoxy(14,11);
    printf("Date of Manufacture:\t%s", dom);

    gotoxy(14,13);
    printf("Date of Expiry:\t\t%s", doe);

    gotoxy(14,15);
    printf("Price:\t\t\t%s\n",price);

    gotoxy(10,17);
    printf("===============================================");

    gotoxy(10,19);
    printf("Press any key to go back!");

getch();
customerMenu();
}

我只能从一个文本文件而不是其他文本文件中读取内容

非常感谢任何帮助