Compilare: user.cpp: In function ‘int main()’: user.cpp:73:17: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(prod<i) ^ user.cpp: In function ‘char nextch()’: user.cpp:17:31: 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); ^