Compilare: user.cpp:18:18: warning: multi-character character constant [-Wmultichar] isend.insert('...'); ^ user.cpp: In function ‘int main()’: user.cpp:18:23: warning: overflow in implicit constant conversion [-Woverflow] isend.insert('...'); ^ user.cpp:37:43: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] while(C[i]==' '||C[i]==','&&i<=N) ^ In file included from /usr/include/stdio.h:934:0, from /usr/include/c++/4.8/cstdio:42, from user.cpp:1: In function ‘char* fgets(char*, int, FILE*)’, inlined from ‘int main()’ at user.cpp:19:27: /usr/include/i386-linux-gnu/bits/stdio2.h:253:58: warning: call to ‘__fgets_chk_warn’ declared with attribute warning: fgets called with bigger size than length of destination buffer [enabled by default] return __fgets_chk_warn (__s, __bos (__s), __n, __stream); ^