Compilare: user.cpp: In function ‘int main()’: user.cpp:27:15: warning: variable ‘p’ set but not used [-Wunused-but-set-variable] int i,n,m,p,max,ans,len,j,val,cnt,x; ^ user.cpp: In function ‘char nextch()’: user.cpp:9:29: 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); ^