binary2.cpp

#include<iostream>
#include<conio.h>
#include<iomanip>
using namespace std;
void genAscii();
string i2b(int i);
string i2hex(int i);
int strlen2(string str);
int c2i(char c);

int main()
{
    cout << c2i('1') << endl;
    //genAscii();
    //cout << i2b('A') << endl;
    //cout << i2hex('A') << endl;

    //cout << strlen2("stringisstring");
    return 0;
}

void genAscii()
{
    for (int i = 31; i < 256; i++) //31 is for layout purpose
    {
        cout << setw(3) << i << "-" << char(i) << " ";
        if (i % 10 == 0)
        {
            cout << endl;
        }
    }
}

string i2b(int i)
{
    string binary = "";
    int d = 0;
    while (i > 0)
    {
        d = i % 2;
        binary = char(d + 48) + binary; //int to number must add 48
        i = i / 2;
    }
    return binary;
}

string i2hex(int i)
{
    string hex = "";
    int d = -1;
    while (i > 0)
    {
        d = i % 16;
        i = i / 16;
        if (d>=0 && d<=9)
        {
            hex = char(d + 48) + hex;
        }
        else if (d>=10 && d <= 15)
        {
            hex = char(d + 55) + hex;
        }
    }
    return hex;
}
string funAnd(int a, int b)
{
    string answer = "";
    string strA = i2b(a);
    string strB = i2b(b);

    return answer;

}
int strlen2(string str)
{
    int count = 0;
    while (str[count] != '\0') {
        count++;
    }
    return count;
}

int c2i(char c)
{

    if (c < 48 || c > 57) {
        return -1;
    }
    return c - 48;
}