Thread: how to check for chars?

Okay, I have to somehow check an integer value for a character or punctuation character. The catch is that the variable has already been read in; therefor I cannot use getch() or.. can I???

Okay, as you can see below, I read in a value and store it as a float, after I store it as a float, I check and see if it is actually a float (double) value. If it is .0, then I know it is an integer so I convert the float to an integer and return 0 to main() to let it know that the user has entered a valid integer.

currently I have the following which checks for float values and it works as long as a period is not entered or a character is not entered. Any ideas ? Suggestions? Again, the value is set and I cannot use getch unless I can take it from a pre-assigned variable.

Code:

int input_validate()  {
int guess;

double temp=12,temp2,i_part;

 temp2=temp;
  
 if (modf(temp,&i_part)>0.)     /*  Checks for a double value  */
   return -1;
 else  {
   guess=(int)temp2;   /*Stores the temp value into guess as Integer */
   if ((guess<100)&&(guess>=0)) 
     return 1;
   else
     return -1;
 }
}

Any ideas how i can check for chars and punctuation??? Thanks.

Okay, would this work correctly?

inside of a function of course:

Code:

int var1;
char strg[10];


strg=var1;

now my question is, how would I parse each individual character from that string? I understand a for loop and or a while loop, but how would I break it apart in the first place?

Well it seems that you could benefit from the ctype library. There you will find such functions as isalpha(), isspace() and so forth.