Compilare: main.cpp: In function 'int main()': main.cpp:25:23: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] 25 | st[vf][k]=NULL; | ^~~~ main.cpp:34:23: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] 34 | st[vf][k]=NULL; | ^~~~ main.cpp:37:23: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] 37 | rez[t][0]=NULL; | ^~~~ main.cpp:41:23: warning: converting to non-pointer type 'char' from NULL [-Wconversion-null] 41 | rez[t][x]=NULL; | ^~~~ main.cpp:10:20: warning: unused variable 'ok' [-Wunused-variable] 10 | int i,k,j,n,vf,ok,t; | ^~ main.cpp:11:10: warning: unused variable 'gasit' [-Wunused-variable] 11 | bool gasit; | ^~~~~