Validating user input in c


24-Oct-2019 03:35

When you enter a text and press enter, then the program proceeds and reads only a single character and displays it as follows − The char *gets(char *s) function reads a line from stdin into the buffer pointed to by s until either a terminating newline or EOF (End of File).

The int puts(const char *s) function writes the string 's' and 'a' trailing newline to stdout.

This section explains how to read values from the screen and how to print the result on the screen.

The int getchar(void) function reads the next available character from the screen and returns it as an integer.

C programming provides a set of built-in functions to read the given input and feed it to the program as per requirement.

When we say Output, it means to display some data on screen, printer, or in any file.

Let us now proceed with a simple example to understand the concepts better − Here, it should be noted that scanf() expects input in the same format as you provided %s and %d, which means you have to provide valid inputs like "string integer".

You can use this method in the loop in case you want to read more than one character from the screen.You can use this method in the loop in case you want to display more than one character on the screen.Check the following example − When the above code is compiled and executed, it waits for you to input some text.Visit Stack Exchange So I've chosen to write just one method (will be a static method of a 'validator' class) that can handle validation for both and am unsure if this is a good idea - having a method that essentially does I've run some tests to check the edge cases and passing in empty strings etc and it passed them, but for some reason this feels kind of wrong.

Should I separate string and integer validation into separate methods?

Secondly, while reading a string, scanf() stops reading as soon as it encounters a space, so "this is test" are three strings for scanf().



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