View Compilation Error

0_0_38585637_21479.cpp: In function 'int main()':
0_0_38585637_21479.cpp:28:9: error: 'sort' was not declared in this scope
         sort(menu, menu + n, cmp);
         ^~~~
0_0_38585637_21479.cpp:28:9: note: suggested alternative: 'qsort'
         sort(menu, menu + n, cmp);
         ^~~~
         qsort