Compilare: user.cpp: In function ‘int main()’: user.cpp:43:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<strlen(cuv2);j++){ ^ user.cpp:52:18: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] text2[k2]=NULL; ^ user.cpp:54:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(text2);i++) ^ user.cpp:80:14: warning: ‘poz_max’ may be used uninitialized in this function [-Wmaybe-uninitialized] p1=c[poz_max]; ^