how do I check to see if user entered a string when integers are asked

[Guest_imported]

If i have a user enter 3 integers, how do I check to make sure that they did use only integers and not characters or strings...

 

[lGOOODl]

You could probaly use.

char string[3] = "123";
bool number1;
bool number2;
bool number3;

if(string[0] = '0' || string[0] = '1' || string[0] = '2' || string[0] = '3' || string[0] = '4' || string[0] = '5' || string[0] = '6' || string[0] = '7' || string[0] = '8' || string[0] = '9')
{
number1 = true;
}

if(string[1] = '0' || string[1] = '1' || string[1] = '2' || string[1] = '3' || string[1] = '4' || string[1] = '5' || string[1] = '6' || string[1] = '7' || string[1] = '8' || string[1] = '9')
{
number2 = true;
}

if(string[2] = '0' || string[2] = '1' || string[2] = '2' || string[2] = '3' || string[2] = '4' || string[2] = '5' || string[2] = '6' || string[2] = '7' || string[2] = '8' || string[2] = '9')
{
number3 = true;
}

if(number1 && number 2 && number 3)
{
//place your code here
}

there's probaly a easy'er way to do this, but it is a solution I hope you can use it!

..:::GOOOD:::..

 

[Leibnitz]

thread181-27567

 

[Leibnitz]

The previous link is from the 'C' Forum,i think that you might find the explanation of what you are looking for in it.

 

[Leibnitz]

Sorry it was the wong link this one is the right one:
Thread205-196473

 

[Zyrenthian]

The easiest way would be to read into a character array and convert the value using atoi. To make sure it is all integers you would use strspn


char buffer[32];
cout<<enter a number;
cin>>buffer

if(strspn(buffer,&quot;1234567890&quot == strlen(buffer))
{
// valid
}


<Matt