cifre.cpp: In function `void transforma()': cifre.cpp:17: warning: comparison between signed and unsigned integer expressions cifre.cpp:22: warning: comparison between signed and unsigned integer expressions cifre.cpp: In function `int main()': cifre.cpp:49: warning: passing NULL used for non-pointer argument passing 2 of `void* memset(void*, int, unsigned int)' cifre.cpp:49: warning: argument to non-pointer type `int' from NULL cifre.cpp:51: warning: passing NULL used for non-pointer argument passing 2 of `void* memset(void*, int, unsigned int)' cifre.cpp:51: warning: argument to non-pointer type `int' from NULL cifre.cpp:55: warning: comparison between signed and unsigned integer expressions