View Compilation Error

0_0_37073266_9836.cpp: In function 'int main()':
0_0_37073266_9836.cpp:13:33: error: 'strlen' was not declared in this scope
             for(i=0;i<strlen(str);i++)
                                 ^
0_0_37073266_9836.cpp:29:9: error: expected '}' at end of input
         }
         ^
0_0_37073266_9836.cpp:29:9: error: expected '}' at end of input