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C201 Schedule of First Two Weeks: Review of C101

C201 Schedule of First Two Weeks: Review of C101. Week 1 Functions Array and sorting Week 2 C-String An application. Program 1: Determine the day of a week. This is formula to determine the day of a week given the date information

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C201 Schedule of First Two Weeks: Review of C101

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  1. C201 Schedule of First Two Weeks: Review of C101 • Week 1 • Functions • Array and sorting • Week 2 • C-String • An application

  2. Program 1: Determine the day of a week This is formula to determine the day of a week given the date information W = (k + floor(2.6*m - 0.2) – 2*C + Y + floor(Y/4.0) + floor(C/4.0)) % 7 Where • floor() denotes the integer floor function, • k is day (1 to 31), • m is month (1 = March, ..., 10 = December, 11 = Jan, 12 = Feb), treat Jan & Feb as months of the preceding year, • C is century (1987 has C = 19, 2000 has C=20 except C=19 for Jan & Feb), • Y is year (1987 has Y = 87 except Y = 86 for Jan & Feb), • W is week day (0 = Sunday, ..., 6 = Saturday), if W is less than 0, add 7.

  3. Program 2 Any even number larger than 2 can be expressed as the sum of two prime numbers (Goldbach's conjecture). Write a program that takes input of an even integer number n (larger than or equal to 4) and find two prime numbers p1 and p2, such that n = p1 + p2, and print p1 and p2. For example, 10 = 3 + 7, or 8 = 3 + 5, or 20 = 13 + 7.

  4. Program 3 Any integer number larger than 5 can be expressed as the sum of three prime numbers (Goldbach's conjecture). Write a program that takes input of an integer number n (larger than or equal to 6) and find three prime numbers p1, p2, and p3 such that n = p1 + p2 +p3, and print p1, p2, and p3. For example, 6 = 2 + 2 + 2, or 8 = 3 + 2 + 3, 11 = 3 + 3 + 5

  5. Array in C++ • Size and index • Search an array • Sort an array

  6. C-String • The ending mark: the ‘\0’character • C-String functions • strlen() • strcmp() • Strcpy() • Strcat() • Implementations

  7. An Application Write a program that asks a user to enter his/her first name, year of birth, and weight (in pounds) in one line separated with spaces. The program should show if the user is overweight using the following formula

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