Adunare/Scadere in Binar

#include <iostream>
#include <string.h>

using namespace std;

int ai[10], bi[10];


void binartoint_suma(char a[10], char b[10])
{
    char ak[10];
    int t = 0;int j = 0;
    for(int i = strlen(a); i >=0 ; i--)
    {

        if(a[i] == '0' && b[i] == '0')
        {
            if(t == 1)
            {
                ak[j] = '1'; t = 0;
            }
            else
            {
                ak[j] = '0'; t = 0;
            }
        }

        if(a[i] == '0' && b[i] == '1')
        {
            if(t == 1)
            {
                ak[j] = '0'; t = 1;
            }
            else
            {
                ak[j] = '1'; t = 0;
            }

        }

        if(a[i] == '1' && b[i] == '0')
        {
            if(t == 1)
            {
                ak[j] = '0'; t = 1;
            }
            else
            {
                ak[j] = '1'; t = 0;
            }
        }

        if(a[i] == '1' && b[i] == '1')
        {
            if(t == 1)
            {
                ak[j] = '1'; t = 1;
            }
            else
            {
                ak[j] = '0'; t = 1;
                if(i == 0) ak[j+1] = '1';
            }
        }
        j++;
    }
    for(int i = strlen(ak)-1; i >= 0;  i--)
    {
        cout<<ak[i]<<" ";
    }
}

bool imprumuta(char a[10], char b[10], int pozitie)
{
    bool result = false;
    for(int i = pozitie+1; i <=strlen(a); i++)
    {
        if(a[i] == '1')
        {
            a[i] = '0';
            result = true;
            break;
        }
    }
    return result;
}

void binartoint_scadere(char a[10], char b[10])
{
    int t = 0;
    cout<<"SCADERE\n\n";
    for(int i = 0; i <= 10; i++)
    {
        if(a[i] == '0' && b[i] == '0')
        {
            if(t == 1)
            {
                if(imprumuta(a, b, i) == true)
                {
                    cout<<"1"; t = 0;
                }
            }
            else
            {
                cout<<"0"; t = 0;
            }
        }
        if(a[i] == '0' && b[i] == '1')
        {
            if(t == 1)
            {
                if(imprumuta(a, b, i) == true)
                {
                    cout<<"0"; t = 0;
                }
            }
            else
            {
                cout<<"1"; t = 1;
            }

        }
        if(a[i] == '1' && b[i] == '0')
        {
            if(t == 1)
            {
                if(imprumuta(a, b, i) == true)
                {
                    cout<<"0"; t = 0;
                }
            }
            else
            {
                cout<<"1"; t = 0;
            }
        }
        if(a[i] == '1' && b[i] == '1')
        {
            if(t == 1)
            {
                if(imprumuta(a, b, i) == true)
                {
                    cout<<"1"; t = 1;
                }
            }
            else
            {
                cout<<"0"; t = 0;
            }
        }
    }
}

int main()
{
    int op;
    char a[10],b[10];
    cout<<"Introduceti numerele: ";cin>>a>>b;
    cout<<"Alegeti operatia: \n1.Adunare\n2.Scadere\n\n";cin>>op;
    if(op == 1)
        binartoint_suma(a, b);
    else
        binartoint_scadere(a, b);


    return 0;
}