Compilare: user.cpp: In function ‘void read()’: user.cpp:16:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:18:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&stramos[i]); ^ user.cpp:22:32: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&a,&b); ^ user.cpp: In function ‘int parent(int, int)’: user.cpp:33:1: warning: control reaches end of non-void function [-Wreturn-type] } ^