Eroare de compilare: user.c: In function ‘read_matrix’: user.c:93:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j, x, y, c; ^ user.c:93:9: warning: unused variable ‘i’ [-Wunused-variable] int i, j, x, y, c; ^ user.c: At top level: user.c:1:0: error: unterminated #ifndef #ifndef _headers_ ^ user.c: In function ‘read_matrix’: user.c:96:12: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d", m, n); ^ user.c:103:16: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d%d%d", &x, &y, &c); ^