C programming validating user input


28-Sep-2019 08:15

c programming validating user input-20

scorpio dating tips 14

The only thing is though that when I enter a 1 to select Euro the app does absolutely nothing. Once they select the number, 1 for Euro, 2 for Deutsche Mark etc, it will prompt you for how many US dollars you want to convert to your selected currency. Alternatively, you can consume the rest of a partially-read line with a simple code fragment like while((c = getchar()) ! = EOF) /* discard */ ; (You may also be able to use the curses flushinp() function.) There is no standard way to discard unread characters from a stdio input stream, nor would such a way necessarily be sufficient, since unread characters can also accumulate in other, OS-level input buffers. The user will be presented with a list of 5 selections they can make. Stepping through a program can be a very educational way of learning how to create good logic. In reality this could be written with only one printf and one scanf (and no getchar()) - place the prompting string and the input function inside a while loop that will iterate the loop when a flag variable is true (or false) depending upon whether you prefer testing positive or negative conditions...After entering a dollar number 0, it will do the conversion and display it for you. If you're trying to actively discard typed-ahead input (perhaps in anticipation of issuing a critical prompt), you'll have to use a system-specific technique; see questions 19.1 and 19.2. They will then be prompted for which selection they want to enter (which can only be 1-5, no characters or anything like it). 12.26b: If fflush() won't work, what can I use to flush input? If you're trying to get rid of an unread newline or other unexpected input after calling scanf() (see questions 12.18a-12.19), you really need to rewrite or replace the call to scanf() (see question 12.20). ----------------------------------------------------------- I suggest that you investigate the is* family of functions (isdigit(), ispunct(), etc.). A simpler alternative is to simply call sscanf() and check for errors. the trick is to initialize the flag to force the loop to be entered the first time...The only thing is though that when I enter a 1 to select Euro the app does absolutely nothing. If you allow scientific notation, you will also need to check for 'e', 'E', 'd' and 'D'.Since it is currency, I would suggest that you can assume fixed point format. Reading the currency value into your program as an integer is a bad idea.The user will be presented with a list of 5 selections they can make.They will then be prompted for which selection they want to enter (which can only be 1-5, no characters or anything like it).Look up the isdigit() function, which will tell you if the character you saw was a digit from 0 to 9.

c programming validating user input-62

dating people shy tip

I guess that only allowing integral values would be bad for the purpose of the assignment, but I do not know for sure.

I have been unsuccessful in doing this so I decided to start over. If any further information is needed please let me know. The user will be presented with a list of 5 selections they can make.

The link below has what I have so far and now when I put a character say 'f' when it asks me for a selection number, it asks me again for a selection # (meaning that i inputted a wrong data type). They will then be prompted for which selection they want to enter (which can only be 1-5, no characters or anything like it).

The only thing is though that when I enter a 1 to select Euro the app does absolutely nothing. The user will be presented with a list of 5 selections they can make.

During the step for selecting what currency you want to convert to and when entering the amount of use dollars, they have to be certain data types. If it is anything else they will go thru a loop and be prompted again to give a selection number (1-5).You may also want to check for a currency symbol like the dollar sign or the pound sign or the deutchmark sign or the euro sign, etc.



You generally maintain the reason why people are single is they over-assess themselves and rate themselves higher than what they originally are.… continue reading »


Read more

When you’re helping you can have some say over how at least some of the meal is prepared.… continue reading »


Read more

Wide Variety of Features to Choose From To ensure you will have the best time on Whitehousecams, we have a wide variety of features to benefit from.… continue reading »


Read more