Compilare: user.cpp: In function ‘int main()’: user.cpp:59:16: warning: unused variable ‘j’ [-Wunused-variable] int n,m,u,i,j,con,l1,l2,c1,c2,tip,lin,iu,iq,floare,sum,val,q; ^ user.cpp: In function ‘char nextch()’: user.cpp:34:30: 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); ^