View Compilation Error

0_0_22210426_17473.cpp: In function 'int main()':
0_0_22210426_17473.cpp:29:21: error: 'dp' was not declared in this scope
     printf( "%d\n", dp[len1][len2] );
                     ^
0_0_22210426_17473.cpp:29:24: error: 'len1' was not declared in this scope
     printf( "%d\n", dp[len1][len2] );
                        ^
0_0_22210426_17473.cpp:29:30: error: 'len2' was not declared in this scope
     printf( "%d\n", dp[len1][len2] );
                              ^