Thread: Passing a string as argument to fgets

Hello there,

I'm trying to prompt the user for a file name (from main.c) and then pass that name as an argument to the fgets function (in file_op.c).

In main.c, I did the following:

Code:

char *file = "testfile.txt";
read_file(file);

In file_op.c:

Code:

void read_file(char * name) {
FILE *file = fopen(name, "r");
if (file == NULL) {
perror("Impossible to open file.");
exit(EXIT_FAILURE);
    }
    
    char *line;

    while (fgets(line, 100, file) != NULL) {
        printf("%s", line);
    }
}

I'm getting a error in Netbeans about accessing memory.
Could you guys help me? I'm not very familiar with this fgets function and all the examples I've found were not very helpful.

Thanks a lot in advance.

The variable "line" is not pointing to any valid memory.

char line[100];

would be a much better way to go.

That did it, thanks a lot both of you!