Compilare: user.cpp: In function ‘int main()’: user.cpp:18:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] int m,type,x,y; fscanf(in,"%d%d",&n,&m); ^ user.cpp:20:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d%d%d",&type,&x,&y); ^