Compilare: user.cpp: In function ‘int main()’: user.cpp:42:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.cpp:44:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &v[i]); ^ user.cpp:41:13: warning: ‘x’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n, i, x, rez = 0; ^