View Compilation Error

0_0_32267909_10194.cpp: In function 'void setCount(int*, char*)':
0_0_32267909_10194.cpp:5:22: error: 'strlen' was not declared in this scope
  int len = strlen(num);
                      ^
0_0_32267909_10194.cpp:7:33: error: 'memset' was not declared in this scope
  memset(arr, 0, 10 * sizeof(int));
                                 ^