Compilare: user.cpp: In function ‘int main()’: user.cpp:7:12: warning: unused variable ‘zero’ [-Wunused-variable] int t, n, zero, ok, i, j, nr; ^ user.cpp:9:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp:11:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &n); ^