Question

1) ROT13 (rotate by 13 places) is a simple letter substitution cipher that is an instance of a Caesar cipher developed in ancient Rome and used by Julius Caesar who used it in his private correspondence. ROT13 replaces a letter with the letter 13 letters after it in the alphabet. The following table demonstrates the translation in ROT13: A ? N B ? O C ? P D ? Q E ? R F ? S G ? T H ? U I ? V J ? W K ? X L ? Y M ? Z Thus, the translation of the word JULIUS using ROT13 would be WHYVHF. Write a C++ program that asks the user to enter a string using the keyboard. Then, translate the input by ROT13 and print it in the output (40 points). 2) Write a program that adds up the positive integers, starting at 1, until the sum equals or exceeds a value read from the keyboard, and then prints the last integer added to the sum. Use a Do-While loop to do the summing (30 points). 3) Write a nested For loop that prints out a multiplication table for the integers 1 through 10. An example of output is shown below (30 points). 1 2 3 4 5 6 7 8 9 10 2 4 6 8 10 12 14 16 18 20 3 6 9 12 15 18 21 24 27 30 4 8 12 16 20 24 28 32 36 40 5 10 15 20 25 30 35 40 45 50 6 12 18 24 30 36 42 48 54 60 7 14 21 28 35 42 49 56 63 70 8 16 24 32 40 48 56 64 72 80 9 18 27 36 45 54 63 72 81 90 10 20 30 40 50 60 70 80 90 100

          1) ROT13 (rotate by 13 places) is a simple letter substitution cipher that is an instance of a Caesar cipher developed in ancient Rome and used by Julius Caesar who used it in his private correspondence. ROT13 replaces a letter with the letter 13 letters after it in the alphabet. The following table demonstrates the translation in ROT13:

A ? N
B ? O
C ? P
D ? Q
E ? R
F ? S
G ? T
H ? U
I ? V
J ? W
K ? X
L ? Y
M ? Z

Thus, the translation of the word JULIUS using ROT13 would be WHYVHF. Write a C++ program that asks the user to enter a string using the keyboard. Then, translate the input by ROT13 and print it in the output (40 points).

2) Write a program that adds up the positive integers, starting at 1, until the sum equals or exceeds a value read from the keyboard, and then prints the last integer added to the sum. Use a Do-While loop to do the summing (30 points).

3) Write a nested For loop that prints out a multiplication table for the integers 1 through 10. An example of output is shown below (30 points).

1  2  3  4  5  6  7  8  9  10
2  4  6  8  10 12 14 16 18 20
3  6  9  12 15 18 21 24 27 30
4  8  12 16 20 24 28 32 36 40
5  10 15 20 25 30 35 40 45 50
6  12 18 24 30 36 42 48 54 60
7  14 21 28 35 42 49 56 63 70
8  16 24 32 40 48 56 64 72 80
9  18 27 36 45 54 63 72 81 90
10 20 30 40 50 60 70 80 90 100

1) ROT13 (rotate by 13 places) is a simple letter substitution cipher that is an instance of a Caesar cipher developed in ancient Rome and used by Julius Caesar who used it in his private correspondence. ROT13 replaces a letter with the letter 13 letters after it in the alphabet. The following table demonstrates the translation in ROT13:

A ? N
B ? O
C ? P
D ? Q
E ? R
F ? S
G ? T
H ? U
I ? V
J ? W
K ? X
L ? Y
M ? Z

Thus, the translation of the word JULIUS using ROT13 would be WHYVHF. Write a C++ program that asks the user to enter a string using the keyboard. Then, translate the input by ROT13 and print it in the output (40 points).

2) Write a program that adds up the positive integers, starting at 1, until the sum equals or exceeds a value read from the keyboard, and then prints the last integer added to the sum. Use a Do-While loop to do the summing (30 points).

3) Write a nested For loop that prints out a multiplication table for the integers 1 through 10. An example of output is shown below (30 points).

1 2 3 4 5 6 7 8 9 10
2 4 6 8 10 12 14 16 18 20
3 6 9 12 15 18 21 24 27 30
4 8 12 16 20 24 28 32 36 40
5 10 15 20 25 30 35 40 45 50
6 12 18 24 30 36 42 48 54 60
7 14 21 28 35 42 49 56 63 70
8 16 24 32 40 48 56 64 72 80
9 18 27 36 45 54 63 72 81 90
10 20 30 40 50 60 70 80 90 100

Added by Kurt H.

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