View Compilation Error

72129_0_21490.cpp: In member function `BigNum BigNum::operator^(const int&) const':
72129_0_21490.cpp:231: error: name lookup of `i' changed for new ISO `for' scoping
72129_0_21490.cpp:228: error:   using obsolete binding at `i'
72129_0_21490.cpp: At global scope:
72129_0_21490.cpp:287: error: `main' must return `int'
72129_0_21490.cpp: In function `int main(...)':
72129_0_21490.cpp:303: error: name lookup of `j' changed for new ISO `for' scoping
72129_0_21490.cpp:302: error:   using obsolete binding at `j'