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  1. #include <cstring>
  2. #include <iostream>
  3. using namespace std;
  4.  
  5. int U1ToInt(const char *U1)
  6.   {
  7.    int ret=0;
  8.    for(const char *i=U1+1;*i;++i)ret=(ret<<1)+*i-'0';
  9.    if(*U1=='1') ret=-ret;
  10.    return ret;
  11.   }
  12.  
  13. int main()
  14.   {
  15.    cout<<U1ToInt("0111")<<endl;
  16.    cout<<U1ToInt("1111")<<endl;
  17.    cout<<U1ToInt("010")<<endl;
  18.    cout<<U1ToInt("110")<<endl;
  19.    cout<<U1ToInt("01")<<endl;
  20.    cout<<U1ToInt("11")<<endl;
  21.    return 0;
  22.   }
Success #stdin #stdout 0s 3340KB
comments (?)
stdin
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Standard input is empty
stdout
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7
-7
2
-2
1
-1
https://ideone.com/Hxwjp7
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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