Compilare: user.cpp: In function ‘void reverse(char*)’: user.cpp:18:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(a)/2; i++) ^ user.cpp: In function ‘bool pali(char*)’: user.cpp:24:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(a) / 2; i++) ^ user.cpp: In function ‘int main()’: user.cpp:43:33: warning: operation on ‘index’ may be undefined [-Wsequence-point] b[index++] = a[n - index - 1]; ^