What is the limitations of using scanf in reading strings?

What is the limitations of using scanf in reading strings?

int i; scanf(“%d”, &i); the above cannot be used safely in case of an overflow. Even for the first case, reading a string is much more simpler to do with fgets rather than with scanf . Yes, you are right.

What are the differences between getchar () and scanf () functions for reading strings?

scanf is a C function to read input from the standard input until encountering whitespace, newline or EOF while getchar is a C function to read a character only from the standard input stream(stdin), which is the keyboard. Thus, this is the main difference between scanf and getchar.

Why scanf is not used for strings?

Why “&” is not used for strings in scanf() function? Below is syntax of Scanf. In case of a string (character array), the variable itself points to the first element of the array in question. Thus, there is no need to use the ‘&’ operator to pass the address.

Can we use scanf to read a string?

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.

Which function can be used to overcome the shortcomings of getchar () and scanf ()?

gets() overcomes the shortcomings of scanf(). Gets stands for get string. In this case, the entire string “Hello Word” will be read by the function. The function takes starting address of the string which will hold the input and automatically appends the null character at the end of the string.

What is the limitation of using gets ()?

The gets() function is risky to use since it doesn’t perform any array bound checking and keep reading the characters until the new line (enter) is encountered. It suffers from buffer overflow, which can be avoided by using fgets(). The fgets() makes sure that not more than the maximum limit of characters are read.

Should I use getchar and scanf?

command = getchar(); but it’s actually a generally bad example as it does not handle End Of File well. In general scanf is best forgotten; fgets and sscanf work much better as one is responsible for getting the input and the other for parsing it. scanf (and fscanf ) try to do too many jobs at once.

Which function can be used to overcome the shortcomings of getchar ()?

Try puts() or printf() . And add a \0 character to denote the end of string when you encounter the ‘\n’ at which point you stop reading. You might want to do some error checking to ensure that getchar() worked properly. It will return EOF on error.

What is the purpose of getchar () function?

A getchar() function is a non-standard function whose meaning is already defined in the stdin. h header file to accept a single input from the user. In other words, it is the C library function that gets a single character (unsigned char) from the stdin.

What is the difference between scanf and gets?

The main difference between them is: scanf() reads input until it encounters whitespace, newline or End Of File(EOF) whereas gets() reads input until it encounters newline or End Of File(EOF), gets() does not stop reading input when it encounters whitespace instead it takes whitespace as a string.