View Compilation Error

0_0_31945770_11509.cpp: In function 'int main()':
0_0_31945770_11509.cpp:13:27: error: 'strlen' was not declared in this scope
             len=strlen(str);
                           ^
0_0_31945770_11509.cpp:20:9: error: expected '}' at end of input
         }
         ^