Table of Contents
Which is better scanf or gets?
scanf can read multiple values of different data types whereas gets() will only get character string data….The difference can be shown in tabular form as follows:
| scanf() | gets() |
|---|---|
| It is used to read input of any datatype | It is used only for string input. |
Why do we use & in scanf for an array but not for a character array?
‘&’ is used to get the address of the variable. C does not have a string type, String is just an array of characters and an array variable stores the address of the first index location.
Why you should not use scanf?
The problems with scanf are (at a minimum): using \%s to get a string from the user, which leads to the possibility that the string may be longer than your buffer, causing overflow. the possibility of a failed scan leaving your file pointer in an indeterminate location.
How do I scanf a character array?
You don’t need to prefix a char array variable with an ampersand in the scanf() function; when using scanf() to read in a string, just specify the string variable name. The scanf() function stops reading text input at the first white space character, space, tab, or Enter key.
Why is Getchar better than scanf?
The main difference between scanf and getchar is that scanf is a formatted way of reading input from the keyboard while getchar reads a single character from the keyboard. The header file provides functions to perform standard input and output operations. The programmer can use these functions in his program.
What is the problem of taking input of strings using scanf () function?
The problem with above code is scanf() reads an integer and leaves a newline character in buffer. So fgets() only reads newline and the string “test” is ignored by the program. The similar problem occurs when scanf() is used in a loop.
Why does scanf () produce a segmentation fault when you pass it an int without the &?
5 Answers. scanf takes a pointer to the memory location where to put the int value. So it tried to use question_no as an address and that caused the seg fault.
Does scanf wait for input?
The scanf() function takes input from the standard input (keyboard) and store the value in a variable. The function waits for the user input until the user press the enter key.
How can I get input without scanf?
3 Answers. There aren’t functions to read integers and floats but you can use fgets with strtol for integers and strtof for floats: // floats: char str_f[20]; float f; fgets (str_f, 20, stdin); f = strtof(str_f, NULL); // integers: char str_i[20]; int i; fgets(str_i, 20, stdin); i = strtol(str_i, NULL, 0);
How do you read a character array?
- name is an array, and \%c expects a char (really expects an int argument); to print a char , use printf(“\%c”, name[0]); , for example.
- If you need to take an character array as input you should use scanf(“\%s”,name), printf(“\%s”,name); rather than using the \%c .
What is the difference between scanf and gets in C++?
The key difference between scanf and gets is that scanf ends taking input upon encountering a whitespace, newline or End Of File (EOF) whereas gets considers a whitespace as the part of the input string and ends the input upon encountering newline or EOF.
How many chars can an array hold in scanf?
The scanf() with format specifier \%s scans the input until a space is encountered. In your case, what you are seeing is undefined behavior. Your array can hold 10 chars, but you are writing out of its boundaries. While you are getting an expected answer now, this is not always guarnateed and may instead cause a crash.
What is the use of scanscanf()?
scanf () 1 It is used to read the input (character, string, numeric data) from the standard input (keyboard). 2 It is used to read the input until it encounters a whitespace, newline or End Of File (EOF). More
How to read entire string in C with scanf?
Actually we can use scanf () to read entire string. For example we can use \% [^ ]s inside scanf () to read entire string. The above code reads the string until it encounters newline. Want to learn from the best curated videos and practice problems, check out the C Foundation Course for Basic to Advanced C.