Compilare: main.cpp: In function 'void modific(char*, char*, int&)': main.cpp:27:31: warning: NULL used in arithmetic [-Wpointer-arith] for(j=i;fisier_intial[j]!=NULL;j++) ^~~~ main.cpp:38:13: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] k[cont]=NULL; ^~~~ main.cpp: In function 'int main()': main.cpp:49:29: warning: NULL used in arithmetic [-Wpointer-arith] while(fisier_intial[i]!=NULL) ^~~~ main.cpp:51:14: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] k[0]=NULL; ^~~~