Compilare: user.cpp: In function ‘int nratoi(char*)’: user.cpp:12:18: warning: NULL used in arithmetic [-Wpointer-arith] while (x[i]!=NULL) ^ user.cpp: In function ‘void rez2(int, char*)’: user.cpp:23:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (nr!=0) ^ user.cpp: In function ‘void rez7(int, char*)’: user.cpp:123:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (lin[0]!=0) ^