Compilare: main.cpp: In function 'int main()': main.cpp:14:19: warning: NULL used in arithmetic [-Wpointer-arith] 14 | for(i=0;k[i]!=NULL;i++)n=n*10+(k[i]-'0'); | ^~~~ main.cpp:20:19: warning: NULL used in arithmetic [-Wpointer-arith] 20 | for(i=0;s[i]!=NULL;) | ^~~~ main.cpp:15:11: warning: 'n' may be used uninitialized [-Wmaybe-uninitialized] 15 | while(n) | ^ main.cpp:12:24: note: 'n' was declared here 12 | int i,nr,semn,egal,n; | ^