View Compilation Error

0_0_5972887_5071.cpp: In function `int main()':
0_0_5972887_5071.cpp:64: error: no match for 'operator+' in 'ans + BigNumber(((char*)(&s)))'
0_0_5972887_5071.cpp:25: note: candidates are: BigNumber BigNumber::operator+(BigNumber&)
0_0_5972887_5071.cpp: At global scope:
0_0_5972887_5071.cpp:76: error: stray '\213' in program
0_0_5972887_5071.cpp:76: error: stray '\170' in program
0_0_5972887_5071.cpp:76: error: stray '\215' in program
0_0_5972887_5071.cpp:76: error: stray '\212' in program
0_0_5972887_5071.cpp:76: error: expected constructor, destructor, or type conversion at end of input
0_0_5972887_5071.cpp:76: error: expected `,' or `;' at end of input