Compilare: user.cpp: In function ‘void convert(char*, int, int)’: user.cpp:34:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (bmax <= x) ^ user.cpp: In function ‘int main()’: user.cpp:57:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(new_s); ++i) ^ user.cpp:58:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; i + j <= strlen(new_s) && j <= 40; ++j) { ^