If statement

[rapster]

I am writing some code. I need an if statement that basically states if a digit does not appear in this span of 80 characters, you will need one.

I am currently setting up an if statement inside my for loop. The for loop controls the length of the string that is being looked at. The if statement I currently have says:

if(isdigit(array[i]))


I need it to convert isdigit to a FALSE boolean statement (i.e. is"not"digit).

How do I do that?

[cire]

if ( !isdigit(array[i]) )

[rapster]

How do I check if a digit exists within a specific range (40)
This is how I have it written, but this does not work.

for( i = 0; i <= 40; i++) {
if(!isdigit(Entered[i]))
cout << "The password must contain at least one digit" << endl;
}

[rapster]

The way I currently has it written produces that statement for each indices that are read. So if I enter 10 letters, the cout statement appears 10 times.

[cire]

Note that range 40 spans index 0 through index 39.

for (i=0; i < 40; ++i)
    if (!isDigit(Entered[i]))
        break ;

if ( i != 40 )
    cout << "The password must contain at least one digit\n" ;

If you don't want something to happen multiple times, don't do it in a loop.

[rapster]

I want my code to look through my entire string and identify if there is a digit or not as well as a few other things. I am under the impression I will need to use isdigit at some point. My thought process was that a loop would cover the span of the desired section of the char string. I am not sure how to go about doing this without a loop.
I need the code to look through it all and produce certain statements depending on digit existence or not, etc.

Sorry, I'm still really new to all of this.

[Lachlan Easton]

cire's code shows exactly that. The for loop checks that every char in the array is not a digit. If a char is a digit then the loop is left early (using break). If the loop is left early then i will not equal 40. So you then check (outside of the loop) if i is not equal to 40 i != 40 and print your error there.

[rapster]

Thank you so much for all of your help! This forum really is very helpful! I look forward to reading more that has been posted on this site and these forums!