Compilare: user.cpp: In function ‘void convert(char*, int, int)’: user.cpp:64:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (bmax <= x) ^ user.cpp: In function ‘int main()’: user.cpp:88:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < strlen(s); ++i) ^ user.cpp:89:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; i + j <= strlen(s) && j <= 40; ++j) { ^