View Compilation Error

1_872_8498_16439.cpp: In function 'int main()':
1_872_8498_16439.cpp:30:14: error: incompatible types in assignment of 'char' to 'char [10000050]'
             T+=s[i];
              ^
1_872_8498_16439.cpp:32:16: error: request for member 'length' in 'T', which is of non-class type 'char [10000050]'
         tlen=T.length();
                ^