# (PHP) MATHS SCRIPT III

i need a skilled coder to write me a program in php which will compute values on the screen and transfer them into a grid.

Program

------------------

take any number and apply the following rules

1. If the number is EVEN divide it by 2.

2. if the number is ODD, multiply it by 3, then ADD 1 to the result, then divide this result by 2.

3. if the number is = 1, STOP.

Rule 3 is important and our goal is to reach 1 when we reach 1 the program will stop executing.

Example 1 (EVEN)

applying the rules will mean

x = 4 is EVEN so rule 1 applies again and we go from 4 to 2

x = 2 is EVEN so rule 1 applies again and we go from 2 to 1

x = 1 so rule 3 applies and we STOP.

the full sequence generated is {4,2,1}

Total Elements in the sequence is 3.

Total Iterations to reach the goal (=1) is 2.

Note Total Iterations to reach 1 is always 1 less than total elements in the sequence.

Special case of x =1 we are already at 1 so we stop (i.e not even start) so the sequence is technically {1} and the Iterations to reach goal is 0.

Example 2: (ODD)

x = 3.

x= 3 is ODD so Rule 2 applies and 3 maps to (3(3) + 1) / 2 = (10/2) = 5

x= 5 is ODD so Rule 2 applies and 3 maps to (3(5) + 1) / 2 = (16/2) = 8

x= 8 is EVEN so Rule 1 applies and 8 maps to (8) / 2 = 4

x= 4 is EVEN so Rule 1 applies and 8 maps to (4) / 2 = 2

x= 2 is EVEN so Rule 1 applies and 8 maps to (2) / 2 = 1

x= 1 so Rule 3 applies and we STOP.

Sequence generated = {3,5,8,4,2,1}

Total Elements in the sequence is 6.

Total Iterations to reach the goal (=1) is 5.

write a phpscript which will

1. ask for a starting number x (e.g 3)

2. ask for a GOAL (default is 1)

3. compute the iterates i.e. 5,8,4,2,1 using the 3 rules above

4. STOP the program when the GOAL is reached

4. output the sequence of iterates on the screen

5. output total number of iterations to reach 1.

e.g suppose i enter 3 into the box and press RUN then

the program will run and the output will be

Sequence for x= 3: {3,5,8,4,2,1}

Iterations to reach Goal (=1): 5

Note: id like u to allow me to alter the rules too, example EVEN RULE x -> x/2 by default but i might decide to make it x-> 2x so we would have a box and i can enter a scalar multiple example 2 or 0.5

similarly for ODD RULE we can have a box to enter 2 values e,g the odd rule is 3X +1 / 2

i could say 7X + 5 or 11X + 7 / 2 so theres 3 values can be modified

the general formula is (AX + B) / C. i am free to choose any A,B,C

default will be A=3 B=1 C=2

Regards.

PLEASE NOTE i will need further work done on this so please if u do this properly i can give u more work

We can store answers in the DB also if we want. for research and to study the numbers

Kĩ năng: PHP, JavaScript, MySQL, HTML

Về Bên Thuê:
( 12 nhận xét ) Clydebank, United Kingdom

ID dự án: #28403224

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