Compilare: main.cpp: In function 'void strcp(char*, char*)': main.cpp:14:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<strlen(b); i++) ~^~~~~~~~~~ main.cpp:16:12: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] aux[i]=NULL; ^~~~ main.cpp:17:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<strlen(aux); i++) ~^~~~~~~~~~~~ main.cpp:20:10: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] a[i]=NULL; ^~~~ main.cpp: In function 'int main()': main.cpp:122:12: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] s[l+1]=NULL; ^~~~ main.cpp:126:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<strlen(s); i++) ~^~~~~~~~~~ main.cpp:132:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=dupa; j<=strlen(s); j++) ~^~~~~~~~~~~