Question

I need som help with this code:

int main(int argc, char** argv)
{
    
    char text[500]; /* Create a character array that will store all of the text in the file */
    char line[100]; /* Create a character array to store each line individually */
    
    FILE *file; /* Create a pointer to the file which will be loaded, to allow access to it */
    char fileName[30]; /* Create a character array to store the name of the file the user want to load */
    
    printf("Enter the name of the file containing ship information: ");
    scanf("%s", fileName);
    
    /*Try to open the file specified by the user. Use error handling if file cannot be found*/
    file = fopen(fileName, "r"); /* Open the file specified by the user in 'read' mode*/
    if(file == NULL)
    {
        perror("The following error occurred: ");
        printf("Value of errno: %d\n", errno);
    }
    else
    {
        printf("File loaded. "); /* Display a message to let the user know
                                  * that the file has been loaded properly */
    }

    while(fgets(line, 100, file)!="\n")
    {
    }
    
    return 0;
    return (printf);
}

1)I want a menu for exemple :[l]oad – [s]ave, when I write "L" then I go to :

printf("Enter the name of the file containing ship information: ");

2. and I need a help with how to make a print to the txt file and how I can save it again with Another name I mean I choose the name .

Answer 1

From your question 1 i.e. menu,
1)I want a menu for exemple :[l]oad – [s]ave, when I write “L” then I go to :

printf(“Enter the name of the file containing ship information: “);

For this part,
char inpChar;

do {
    printf("enter menu: [l]oad - [s]ave\n");
    scanf("%c", &inpChar);
} while((inpChar != 'l') && (inpChar != 'L') && (inpChar != 's') && (inpChar != 'S'));

if((inpChar == '1') || (inpChar == 'L'))
{
     printf("Enter the name of the file containing ship information: ");
     scanf("%s", filename);
}

For Q2 of printing to file,

file = fopen(filename, "a");
fprintf(file, "%s", line);
fclose(file);