#include <iostream>
#include <string>
#include <math.h>
using namespace std;
int main()
{
string s;
getline(cin,s);
int len;
int index;
len=s.length();
int result=0;
for (index=0;index<len;index++)
{
result+=(s[len-1-index]-48)*pow(2,index);
}
cout<<len<<endl;
cout<<result<<endl;
return 0;
}
函数提出来：
#include <iostream>
#include <string>
#include <math.h>
using namespace std;
int chang2to10(int len,string &str);
int main()
{
string s;
getline(cin,s);
int len;
int result;
len=s.length();
result=chang2to10(len,s);
cout<<len<<endl;
cout<<result<<endl;
return 0;
}
int chang2to10(int len,string &str)
{
int index,result=0,length;
length=len;
for (index=0;index<length;index++)
{
result+=(str[len-1-index]-48)*pow(2,index);
}
return result;
}
