以下代码不起作用..为什么？

Question

The following code isn't working as expected ..

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

struct dest
{
    char filename[20], keyword[20];
    bool opened;
    FILE * stream;
};


void display_data(const struct dest p) {
    printf("Keyword: %s, Filename: %s, Used: %s\n", p.keyword, p.filename, p.opened ? "Yes" : "No");
}

int main(int argc, char const *argv[])
{
    // float lon, lat;
    // char info[80];

    if ((argc+1) % 2) {
        fprintf(stderr, "Usage: %s file_to_read file_for_unknown type file type file ...\n", argv[0]);
        return 2;
    }

    if (access(argv[1], F_OK) == -1) {
        fprintf(stderr, "File can't be accessed: %s\n", argv[1]);
        return 2;
    }

    const short pairs = (argc-3)/2;
    struct dest data[pairs];

    short times = 4;
    for(short i = 4; i < argc; i += 2) {
        struct dest data[i-times];
        data[i-times].opened = false;
        strcpy(data[i-times].keyword, argv[i-1]);
        strcpy(data[i-times].filename, argv[i]);
        // display_data(data[i-times]);
        times += 1;
    }

    display_data(data[0]);

    return 0;
}

That's what happens when I try to run it ..

./categorize spooky.csv other.csv UFO UFOS.csv
Keyword: ?, Filename: @, Used: No

Which isn't that meaningful ..
I have been trying to work out the solution .. in vein ..
I don't understand where the problem is ..

Arguments are parsed as follows:

: the file the program is supposed to read from (ignored for now)
: the file the program is supposed to store at any unknown info found in the spooky.csv file (also, ignored in this implementation)
: they are parsed as pairs, the first is the keyword, the second is the file ..

My Solution for this filtering problem was to create an array of structs, and within each struct I store the keyword, the filename and the file io stream (which i am ignoring, for now) ..

Any help would be highly appreciated ..

Answer 1

You have 2 struct dest data[] arrays. The inner one is masking the outer - get rid of it.

Your compiler is probably warning about this, if you have warnings turned on.