C++ 二进制，八进制，十进制，十六进制 输出

#include <iostream>#include <bitset>using namespace std;int main(){unsigned int i = 1234;cout<<hex<<"hex:i="<<static_cast<unsigned int>(i)<<endl;cout<<oct<<"oct:i="<<static_cast<unsigned int>(i)<<endl;cout<<dec<<"dec:i="<<static_cast<unsigned int>(i)<<endl;cout<<"bin:i="<<bitset<sizeof(unsigned int)*8>(i)<<endl;return 0;}