Do-while code for long integer input

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It is mentioned in the problem:

American Express uses 15-digit numbers, MasterCard uses 16-digit numbers, and Visa uses 13- and 16-digit numbers.

So with get_long, I perhaps need to restrict input integers by user from 13 to 16 digits.The objective is met for smaller integers such as between 10 and 99.

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#include <stdio.h>
#include <cs50.h>
int main(void)
{
int input;
do
    {
      input = get_long("enter");
    }
while (input<10 || input>99); 

}

[/dm_code_snippet]

 

Seeking help for ways I can restrict input of integers from 13 to 16 digit numbers. While I can accept input from 10 to 99, not working when instead of 10, replaced with 1000000000000 and 99 replaced with 9999999999999999.

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Reply

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Okay after replacing int with long, indeed I could accept input from 13 to 16 digit numbers.

[dm_code_snippet background=”yes” background-mobile=”no” slim=”yes” line-numbers=”yes” bg-color=”#abb8c3″ theme=”dark” language=”clike” wrapped=”yes” height=”” copy-text=”Copy Code” copy-confirmed=”Copied”]

#include <stdio.h>
#include <cs50.h>
int main(void)
{
long input;
do
    {
      input = get_long("enter");
    }
while (input<1000000000000 || input>9999999999999999); 
}

[/dm_code_snippet]

https://cs50.stackexchange.com/questions/41891/do-while-code-for-long-integer-input[learn_press_profile]

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