Compilare: user.cpp: In function ‘int main()’: user.cpp:53:30: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%hd %hd",&N,&K); ^ user.cpp: In function ‘char nextch()’: user.cpp:26:30: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf,1,MAXBUF,f); ^