Instructor note:

Hint: Check out Figure 4.6.1: "Iterating through a string: Counting letters", and review how to use the isdigit() function.

LAB ACTIVITY

4.18.1: LAB: Checker for integer string

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Forms often allow a user to enter an integer. Write a program that takes in a string representing an integer as input, and outputs Yes if every character is a digit 0-9.

Ex: If the input is:

1995

the output is:

Yes

Ex: If the input is:

42,000

or

1995!

the output is:

No

Hint: Use a loop and the isdigit() function (don't forget to include the cctype library).

 

Transcribed Image Text:

Instructor note: Hint: Check out Figure 4.6.1: "Iterating through a string: Counting letters", and review how to use the isdigit() function. LAB ACTIVITY 4.18.1: LAB: Checker for integer string 0/ Forms often allow a user to enter an integer. Write a program that takes in a string representing an integer as input, and outputs Yes if every character is a digit 0-9. Ex: If the input is: 1995 the output is: Yes Ex: If the input is: 42,000 or 1995! the output is: No Hint: Use a loop and the isdigit() function (don't forget to include the cctype library). Instructor note: Hint: Check out Figure 4.6.1: "Iterating through a string: Counting letters", and review how to use the isdigit() function. LAB ACTIVITY 4.18.1: LAB: Checker for integer string 0/ Forms often allow a user to enter an integer. Write a program that takes in a string representing an integer as input, and outputs Yes if every character is a digit 0-9. Ex: If the input is: 1995 the output is: Yes Ex: If the input is: 42,000 or 1995! the output is: No Hint: Use a loop and the isdigit() function (don't forget to include the cctype library).