Eroare de compilare: main.cpp: In function 'void quicksort(int, int)': main.cpp:25:15: error: 'index' was not declared in this scope 25 | a[index++] = v[i]; | ^~~~~ main.cpp:28:15: error: 'last' was not declared in this scope 28 | a[last--] = v[i]; | ^~~~ main.cpp:33:19: error: 'index' was not declared in this scope 33 | a[index++] = v[i]; | ^~~~~ main.cpp:37:7: error: 'index' was not declared in this scope 37 | a[index++] = v[pivot]; | ^~~~~ main.cpp: In function 'int main()': main.cpp:54:9: warning: unused variable 'x' [-Wunused-variable] 54 | int x; | ^ Non zero exit status: 1