Compilare: user.cpp: In function ‘int main()’: user.cpp:52:19: warning: variable ‘k’ set but not used [-Wunused-but-set-variable] int nr,i,n,q,r,k; ^ user.cpp: In function ‘char nextch()’: user.cpp:35:30: 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,fi); ^