View Compilation Error

0_0_16207482_4529.cpp: In function 'int main()':
0_0_16207482_4529.cpp:11:15: error: 'strlen' was not declared in this scope
   if (strlen(A) > strlen(B))
               ^
0_0_16207482_4529.cpp:16:19: error: 'strlen' was not declared in this scope
   c = a + strlen(a) - 1;
                   ^