problem1. describe how the 'putchar' function differs from the 'printf'. Illustrate with an appropriate ex of your own.
problem2. What is the purpose of control string in 'scanf' function?
problem3. How is each character group in the control string identified?
problem4. If a control string in 'scanf' function contains multiple character groups, how are the character groups separated?
problem5. If whitespace characters are present in control string, how are they interpreted?
problem6. How can the maximum field width for data item be specified in a 'scanf' function?