Hi. I am working on a stubs only miniature program for school concerning adding integers much too large to be stored as integers. What I have so far seems to work great up until I add 10 integers to 10 integers. Here is what I have so far, and kindly thank anyone who has time to give me a bit of advice. I apologize for the lack of documentation in this program - I haven't really gotten that far yet.

Code:

const int MAXCHARS = 80;
char numbers[MAXCHARS];
int result[MAXCHARS];
char num1[MAXCHARS];
char num2[MAXCHARS];
char op;
int splitPoint;
int opFinder = 0;
int count1 = 0;
int count2 = 0;
int x;
int ar1Length;
int ar2Length;
int maxLength;
int temp1;
int temp2;
int tempResult;
int carry1 = 0;
int carry2;
int main()
{
cout << "This program adds or multiplies numbers" << endl
<< "much too large to be stored as integers." << endl
<< "Please refer to the example to enter your problem." << endl << endl
<< "(EXAMPLE) 100 + 10" << endl << endl
<< "Calculate: ";
cin.getline(numbers, MAXCHARS, '\n');
for(opFinder = 0; opFinder < MAXCHARS; opFinder++)
{
if((numbers[opFinder] == '+') || (numbers[opFinder] == '*'))
{
splitPoint = opFinder;
op = numbers[opFinder];
}
}
while(isdigit(numbers[count1]))
{
num1[count1] = numbers[count1];
numbers[count1] = '\0';
num1[count1+1] = '\0';
cout << num1[count1] << endl;
count1++;
}
ar1Length = count1-1;
num1[count1] = '\0';
count1 = 0;
count2 = splitPoint + 1;
while(numbers[count2] != '\0')
{
if(numbers[count2] == ' ')
{
count2++;
}
num2[count1] = numbers[count2];
numbers[count2] = '\0';
num2[count1 + 1] = '\0';
count1++;
count2++;
}
ar2Length = count1-1;
num2[count1] = '\0';
if(ar1Length > ar2Length)
{maxLength = ar1Length;}
else
{maxLength = ar2Length;}
cout << "You have entered: " << endl
<< setw(maxLength+2) << setfill(' ') << num1 << endl
<< op << setw(maxLength+1) << setfill(' ') << num2 << endl;
for(x = 0; x <= maxLength+2; x++)
{cout << "-";}
cout << endl;
x = 0;
while((num1[x] != '\0') || (num2[x] != '\0'))
{
if((num1[x] == '\0') && (num2[x] == '\0'))
{break;}
else if(num1[x] == '\0')
{temp1 = 0;}
else if(num2[x] == '\0')
{temp2 = 0;}
else
{
temp1 = atoi(&num1[x]);
temp2 = atoi(&num2[x]);
}
if((temp1+temp2) > 9)
{
tempResult = (temp1 + temp2) % 10;
carry1 = (temp1 + temp2) / 10;
}
tempResult = temp1 + temp2 + carry2;
result[x] = tempResult;
num1[x] = '\0';
num2[x] = '\0';
result[x+1] = '\0';
cout << result[x] << endl;
temp1 = 0;
temp2 = 0;
carry2 = carry1;
}
return 0;
}