Compilare: user.cpp: In function ‘int main()’: user.cpp:49:22: warning: statement has no effect [-Wunused-value] for(i; i<k; i++, j++) ^ user.cpp:17:37: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d%d", &v, &n, &k); ^ user.cpp:21:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &bat); ^ user.cpp:36:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &l[i]); ^