#include <stdio.h>
typedef struct Forca // definining struct here
{
    char palavra[TAM_PALAVRA];
    char palavra_mascarada[TAM_PALAVRA];
    int erros, acertos, tentativas;

} t_forca;
void salva_jogo(t_forca forca) //function that writes structure inside bin file
{
    FILE* save;
    save = fopen("save.bin", "w b");
    if (save == NULL)
    {
        printf("\nerro no arquivo\n");
    }
    fwrite(&forca, sizeof(forca), 1, save);
    fclose(save);
}
void carrega_jogo(t_forca* forca) //function that read struct inside bin file
{
    FILE* readsave;
    readsave = fopen("save.bin", "r b");
    if (readsave == NULL)
    {
        printf("\nerro no arquivo\n");
    } //printf error
    fread(forca, sizeof(forca), 1, readsave);
    fclose(readsave);
}

basically I'm trying to save and read a structure inside a binary file, and I'm quite lost cuz the file is being written but not read at all

CodePudding user response：

In the function carrega_jogo, forca is a pointer, sizeof(forca) is the same as size of pointer, which is 4 or 8 bytes, depending on your system or compiler settings. The read function ends up reading only 4 or 8 bytes. The rest of the structure is likely uninitialized and leads to undefined behavior.

The correct version should be sizeof(t_forca)

Aside, for fwrite/fread it is enough "wb" and "rb".