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【正文】 *3=27 9*4=36 9*5=45 9*6=54 9*7=63 9*8=72 9*9=81Exercise 6: Simple Functions 1. Write a C program that reads several numbers and uses the function round_to_nearest to round each of these numbers to the nearest integer. The program should print both the original number and the rounded number. 2. Write a program that reads three pairs of numbers and adds the larger of the first pair, the larger of the second pair and the larger of the third pair. Use a function to return the larger of each pair.3. A car park charges a 163。200 plus 9% of 163。200 per week plus 9% of their gross sales for that week. For example, someone who sells 163。(c) Modify this program to print “This is my second program!”, then save it as e21b. Please do not overwrite the first program.2. Write a program that prints the number 1 to 4 on the same line. Write the program using the following methods:(a) Using four “printf” statements.(b) Using one “printf” statement with no conversion specifier (. no ‘%’).(c) Using one “printf” statement with four conversion specifiers3．(a) Write a program that calculates and displays the number of minutes in 15 days. (b) Write a program that calculates and displays how many hours 180 minutes equal to. (c) (Optional) How about 174 minutes?Exercise 2: Data Types and Arithmetic Operations1. You purchase a laptop puter for $889. The sales tax rate is 6 percent. Write and execute a C program that calculates and displays the total purchase price (net price + sales tax).2．Write a program that reads in the radius of a circle and prints the circle’s diameter, circumference and area. Use the value for “p”.3．Write a program that reads in two numbers: an account balance and an annual interest rate expressed as a percentage. Your program should then display the new balance after a year. There are no deposits or withdraws – just the interest payment. Your program should be able to reproduce the following sample run:Interest calculation program.Starting balance? 6000Annual interest rate percentage? Bal
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