View Compilation Error

0_0_14511751_28819.cpp: In function 'int main()':
0_0_14511751_28819.cpp:22:9: error: 'it' was not declared in this scope
         it len=strlen(c);
         ^
0_0_14511751_28819.cpp:23:24: error: 'len' was not declared in this scope
         for(int i=0; i<len; i++)
                        ^