View Compilation Error

0_0_32959201_2543.cpp: In function 'int main()':
0_0_32959201_2543.cpp:11:21: error: 'strlen' was not declared in this scope
   int len = strlen(a);
                     ^
0_0_32959201_2543.cpp:38:4: error: expected primary-expression before '%' token
    %0
    ^
0_0_32959201_2543.cpp:38:5: error: expected '}' at end of input
    %0
     ^
0_0_32959201_2543.cpp:38:5: error: expected '}' at end of input
0_0_32959201_2543.cpp:38:5: error: expected '}' at end of input
0_0_32959201_2543.cpp:38:5: error: expected '}' at end of input
0_0_32959201_2543.cpp:38:5: error: expected '}' at end of input