equation3-2-1.cpp

This is solution code c++ in class lesson.

#include<iostream>
using namespace std;
int main()
{   
    string input;
    cout << "Enter a number (8-bits binary): ";
    cin >> input;
    int value = 0;
    value -= ((int)(input.at(0) - '0')) * 128;
    value += ((int)(input.at(1) - '0')) * 64;
    value += ((int)(input.at(2) - '0')) * 32;
    value += ((int)(input.at(3) - '0')) * 16;
    value += ((int)(input.at(4) - '0')) * 8;
    value += ((int)(input.at(5) - '0')) * 4;
    value += ((int)(input.at(6) - '0')) * 2;
    value += ((int)(input.at(7) - '0')) * 1;
    cout << "The decimal number of " << input << " is " << value << endl;
    system("pause");
    return 0;
}