working with strings and substrings

[mstekkie]

i'm having a lot of problems with this program. hopefully someone can help me out.

the program prompts the user for an equation such as 123 + 123 = what i'm supposed to do is break up the string into four substrings and display each string on its own line. i know how to display the substrings, but my problems is with breaking up the string into the substrings.

this is the code i have so far for trying to separate the string:

if (cin.peek == " &quot
cin.ignore();
else
cin >> first;

i know it's wrong but i don't know how to fix it. any help will be greatly appreciated.

 

[2ffat]

I see two options. One is to capture everything on the input line and then parse it out.

cin >> TheLine;
int WordCount = 0, Z = 0;
string TheWord;
int ChrCnt = TheLine.length();
for (int j=0; j<=ChrCnt; j++)
{
    if TheLine[j] == &quot; &quot;
    {
        TheWord++;
        Z = 0;
    }
    else
    {
        if TheWord == 1
        {
            First[Z] = TheLine[j];
            Z++;
        }
        else if TheWord == 2
        {
            Second[Z] = TheLine[j];
            Z++;
.
.
.
[code]

BTW, I'm doing this very quickly so the logic may not exactly work but you should get the idea.

My prefered way to do this is to use [b]getline[/b] and look for the space. You could do this either on the fly or by capturing the whole line like the above example. James P. Cottingham
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