A successful call to ungetc() will clear end-of-file indicator for the stream. After all pushback bytes have been read or discarded, the stream’s file position indicator shall have the same value as before the pushback bytes.

How does Fgets work in C?

fgets() function in C Read at most n characters from the stream (file stream or standard input stream) to the string str.
…
The fgets() function continues reading characters until:

1. (n-1) characters have been read from the stream.
2. A newline character was encountered.
3. End of file (EOF) reached.

What is Putchar in C language?

putchar() function in C language

The putchar(int char) method in C is Used to write characters of type unsigned char to standard output. This character is passed as a parameter to this method. Parameters: This method accepts a mandatory parameter char which is the character to be written to standard output.

What is the Getchar function in C?

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

Which fallback character is guaranteed per file?

6. When using ungetc(c, fp);, how many echo characters are guaranteed per file? explain: not any.

What is the ungetc function?

24 related questions found

Which of the following cannot be used with Ungetc?

Which of the following cannot be used with ungetc()? explain: not any.

What are file reserved words?

Struct tag declared in stdio.H. One of the basic data types in c. Pointer to a structure defined in stdio.h. ✅ It is the type name defined in stdio.h.

What is Getch?

getch() method suspends output to the console until a key is pressed. It does not use any buffer to store input characters. Typed characters are returned immediately without waiting for the Enter key. … the getch() method can be used to accept hidden input such as passwords, ATM passwords, etc.

What is an example of iteration in C?

Iteration is When the same program is repeated multiple times. Some examples are long division, Fibonacci numbers, prime numbers and calculator games. Some of them also use recursion, but not all. A bunch of consecutive integers, or repeating a process a given number of times.

What is scanf() in C language?

In the C programming language, scanf is Function to read formatted data from standard input (i.e. the standard input stream, usually the keyboard, unless redirected), then write the result to the given arguments.

What puts return into C?

puts function returns non-negative value if successful. The puts function will return EOF if an error occurs while trying to write to stdout.

What is the difference between putchar and printf?

printf is a generic print function that takes 100 different format specifiers and prints the correct result string. putchar , well, Put a character on the screen. It also means it’s probably much faster. …it looks like when you only have a char in printf, the compiler converts it to putchar().

Why use C language in embedded systems?

C provides optimized machine instructions for a given input, thereby increasing the performance of embedded systems. Most high-level languages ​​rely on libraries, so they require more memory, which is a major challenge in embedded systems. …and since C doesn’t do this, there is little overhead.

Does fgets wait for input?

fgets() don’t wait for input

However, the first time fgets doesn’t seem to wait for standard input. I always get the output of – and then it waits for input. Meaning, the first iteration of the loop, it doesn’t wait for the stdin of fgets, but just prints out two null characters separated by -, like my printf does.

What is the difference between puts and fputs in C?

put option Copy the null-terminated string s to the standard output stream stdout and append a newline.fputs Copies the null-terminated string s to the specified output stream. Neither routine will copy the terminal null character.

Why is fgets better than gets?

fgets() is Safer version of gets() where you can limit the input size. You can also decide which stream to get input from (eg file or standard input). Let’s say our input is,… Note that fgets() includes the terminating character in the buffer, so the string has 14 characters of input.

What are the two types of iteration?

There are two ways a program can iterate or « loop »:

• Count control loop.
• Conditionally controlled loops.

What are the three types of iteration?

Iteration is another way of saying « do something multiple times ». Most problems can be solved with recursion and iteration, but one form may be easier to use than the other. We will look at three forms of iteration: Tail recursion, while loops, and for loops.

What is an example of iteration?

Iteration is process of repeating stepsFor example, a very simple algorithm for eating breakfast cereal might consist of the following steps: Put the cereal in a bowl. … repeat step 3 until all cereals and milk have been eaten.

What C program will be asked in the interview?

C program

• 1) Fibonacci sequence.
• 2) Prime numbers.
• 3) The number of palindromes.
• 4) Factorial.
• 5) Armstrong number.
• 6) Sum of numbers.
• 7) Countdown.
• 8) Swap two numbers without using a third variable.

Why use scanf in C?

scanf() function Enables programmers to accept formatted input for applications or production code. In addition, by using this feature, the user can provide dynamic input values ​​to the application.

Why use Clrscr in C?

clrscr() is Used to clear the console screen. To use this feature we have to add the header file #include. In the c programming language, clrsr() to clear the console window.

Is file a reserved word in C?

What are FILE reserved words? explain: not any.

Which function would you choose to connect two words?

1. Which function would you choose to add two words?This strcat() function For concatenating two strings, appending a copy of the string.

What are the first and second arguments to fopen ?

Question: What are the first and second arguments to fopen?

• A string containing the filename, the second parameter is the mode.
• A string containing the username, the second parameter is the mode.
• The string containing the file pointer and the second argument is the pattern.