Compilare: main.c: In function 'main': main.c:48:5: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &x ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:51:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &card[ i ][ j ] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:55:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &mat[ l ][ c ] ); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~