Please help with this C++ programming question

Question

Using pseudo code algorithms!

c++ only

1- Detect if three angles can make a triangle. (1)

• Hint: In a triangle, the sum of all angles is 180.

2- Switch the value of two numbers (1)

• If a=2 and b=5, we want to have a=5 and b=2 at the end.

• Remember that a=b will result in the old value to of a to get lost.

3- Receive a set of numbers and find the max. (1)

4- In the previous case (3), switch the value of first number with the max (1)

5- Use what you did in (4) and sort the set of numbers. (1)

• Max value goes to the first data, then max of remaining values goes to the second, etc.

Answer 1

1. Count how many angles given will summing them up.  If you weren't given just three angles or if they don't all add up to 180, then it cannot make up a triangle.

 

2. create a temp variable tmp to hold one of the value

  tmp=a

  a=b

  b=tmp

 

3. set variable highest equal to the first element in the array.

  walk the array starting with the 2nd element. If an entry is higher than highest, set highest to the value

 

4. walk array starting with the 2nd element. if an entry is higher than array[0] use the swap in #2 to switch them

 

5. this requires two loops

   outer walk array starting at 1st element and go to less than size of the array - 1  [ outer < array_size-1]

       inner walk array starting at 1 higher than outer walk and go to less than size of array [ inner < array_size ]

          if array[outer] < array[inner] swap the values

There is a third way - the array itself may contain a flag to indicate that the end has been reach.  For example, null character ('\0') is used to indicate the end of an array of characters.