How do i write algorithms?

[Avery BErry]

Write an algorithm that gets a numeric grade value 0 to 100 from the user, and produces the equivalent letter grade using the standard scale of 90-100 is A, 80-89 is B, 70-79 is C, 60-69 is D, and below 60 is F. The output should resemble:
The score entered was 85 and the letter grade is B
Compute and display the value x ÷ y if the value of y is not 0. If y does have the value 0, then display the message 'Unable to perform the division.'
Compute the volume and circumference of a cylinder given the length L and radius r if the radius is greater than or equal to 1.0; otherwise, your algorithm should compute only the circumference.
Write an algorithm that take three numbers and determines which number is the largest of the three and outputs something along the lines of:
The largest value of 10, 22, and 11 is 22

[wizardry]

the code below should give you an example of how to do the formulas for letter grades. the question is are u going to be creating pointers/virtual pointers or need to inherit their functions for more processing instead of re-writting the code? but for the cylinder this should give you an example as well on how to take the integers given and formulate them.

here is an example:

//Author Theo Werntz II
//CIS 242
//Date 07/21/04
//Project L_2_P_1
 
 
#include <iostream>
 
using std::cout;
using std::cin;
using std::endl;
 
 
 
// main functions
 
 
int main()
{
   int total = 0;          // total feed
   int feedA = 2.50;     // feedA
   int feedB = 3.15;     // feedB
 
 
 
   cout << "Enter the letter of feed." << endl
        << "The Feed List Is As." << endl
    << "Feed A = $2.50 per 100 lbs."<< endl
    << "Feed B = $3.15 per 100 lbs."<< endl
    << "When Finished with Order Press."<<endl
    <<    "CTRL Z to Calculate Total."<<endl;
 
 
 
//while loop for total
 
 
   while ( ( total = cin.get() ) != EOF ) {   
 
 
// determine which feed is input
 
 
      switch ( total ) {      // nested switch structure in while
 
 
         case 'A':            // feedA uppercase A
         case 'a':            // or feedalowercase a
            ++feedA;         // increment aCount
            break;            // exit switch
 
 
         case 'B':            // feedB uppercase B
         case 'b':            // or feedb lowercase b
            ++feedB;         // increment bCount    
            break;            // exit switch
 
 
         case '\n':           // ignore newlines,  
         case '\t':           // tabs, 
         case ' ':            // and spaces in input
            break;            // exit switch
 
 
         default:             // trap for anything except letter a 
                            // and letter b.
            cout << "Incorrect feed letter was entered."
                 << " Enter a new feed letter." << endl;
            break;            //exit switch 
 
 
      }             // end switch
 
 
   }                 // end while
 
   // output summary of feed
 
   cout << "\n\nTotals For each Feed Are:" 
        << "\nA: " << feedA           // display number of A feed ordered
        << "\nB: " << feedB           // display number of B feed ordered
        << endl;
 
   return 0;              // indicate successful termination
 
}                 // end function main
 
 
 
 

[donbock]

The algorithm is the strategy you use to solve the problem. An algorithm can be expressed in text (like a cookbook recipe), graphically (like a flowchart), or in a computer language.

[Oralloy]

Don has the right of it.

An algorithm is simply an unambiguous statement of how to achieve a result.

The rest is implementation.

So, since we're not in the homework business, Avery, how about you take a stab at your three and tell us what your algorithms are. Then we can comment on them for you.

Cheers!