Compilare: user.cpp: In function ‘void scoatespatiu()’: user.cpp:12:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<strlen(sir); i++) ^ user.cpp: In function ‘void preparate()’: user.cpp:89:25: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] a[poz][poz1]=NULL; ^ user.cpp: In function ‘void cautamax()’: user.cpp:113:25: warning: NULL used in arithmetic [-Wpointer-arith] if(a[i][j]==NULL) ^ user.cpp: In function ‘int main()’: user.cpp:136:33: warning: NULL used in arithmetic [-Wpointer-arith] if(a[maxim][j]==NULL) ^