Eroare de compilare: user.c: In function ‘main’: user.c:14:5: error: ‘foout’ undeclared (first use in this function) foout = fopen("adunare.out", "w"); ^ user.c:14:5: note: each undeclared identifier is reported only once for each function it appears in user.c:18:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a); ^ user.c:19:5: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &b); ^