Compilare: user.cpp: In function ‘int main()’: user.cpp:30:21: warning: unused variable ‘crt’ [-Wunused-variable] int n, k, nr=0, crt; ^ user.cpp:31:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d %d", &n, &k); ^ user.cpp:35:63: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%lld %lld",&show[i].start, &show[i].stop); ^