Compilare: user.cpp: In function ‘void df(int)’: user.cpp:32:4: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(!length) ^ user.cpp: In function ‘bool revenire(int)’: user.cpp:20:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:50:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%hd%hd",&n,&m); ^ user.cpp:54:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d",&x,&y); ^ user.cpp:63:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%hd",&q); ^ user.cpp:66:35: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%hd%hd",&w,&length); ^