View Compilation Error

0_0_33272340_7692.cpp: In function 'void read()':
0_0_33272340_7692.cpp:23:31: error: 'scanf_s' was not declared in this scope
   scanf_s("%d%d%d", &u, &v, &w);
                               ^
0_0_33272340_7692.cpp: In function 'int main()':
0_0_33272340_7692.cpp:32:29: error: 'memset' was not declared in this scope
   memset(val, 0, sizeof(val));
                             ^
0_0_33272340_7692.cpp:40:27: error: 'scanf_s' was not declared in this scope
    int s; scanf_s("%d", &s);
                           ^