Compound interest adds to the project

I. Customer needs

Completed requirements:

1. Customer said: Help me develop a compound interest calculation software.

2. If according to simple interest calculation, how much is the principal and interest?

3. If a pension of $3 million is to be raised after 30, the average annual return is 3%, what is the amount of principal that must be invested now?

4. Interest rate is so low, compounding profits are so strong, if take 1 million yuan to buy annual rate of return 10% of the stock, if all smooth, too long, 1 million yuan becomes 2 million yuan?

5. If I want to turn $1 million into $2 million within 10 years, how much should I find the investment tool to help me achieve my goals? If you want to double the principal after 5 years, how much should the rate of return be at least?

6. If the savings of $30,000 are to be invested annually, with a return of 3% per annum, and then a new round of investment in these Benli and annuities, what will the total value of assets be after 30 years? What if we switch to 3000 a month?

New requirements:

That is, to pursue benefits, but also to face unpredictable financial investment risks, "can not put eggs in the same basket", it is necessary to make a portfolio investment.

The above calculations and comparisons can help customers make investment decisions.

Customer: So can you help me to record a different type of investment, and dynamically show the current value of money?

Customers under the guidance of the people have more ideas:

1. I often fill in this data ..... Would you please fill it in beforehand? ......
2. Make the interface simple and beautiful.
3. Can you help me to turn into an app, I put on the mobile phone is more convenient?
4. I think this is very useful, many people may need these features, to do my public number it?
5. Could you please not let me fill out the form, let me wind the news, or say a word to the phone?

Two. Task assignment

I: Responsible for some common data to accept, reduce customer fill time

Teammates: Responsible for the interface design of more humane, beautiful

Three. Pair members

Name: Ho

Study No.: 201406114240

Blog Park Address: http://www.cnblogs.com/40heyuming/

Four. Team Work photos

five. Estimated Time

Estimated Time: 4h

Estimated code line: 150

Actual elapsed time: 4.5h

Actual code line: 180

Six. Results

Seven. Harvesting and sentiment

This time the compound interest calculation to realize the function more, also more difficult, in my and companion's discussion, found that at our current level can do only the interface beautification and some commonly used data input reminder, also do not good, other realization up to us difficult, also do not know how to cut in, For example (could you please not let me fill out the form, let me wind the news, or say a word to the phone?)   ) Voice input? There is no enforceability on the basis of C. Think of me and my companion also feel that their knowledge is not enough, try to change to Java or other version, but because of the function of compound interest to now many, try to fail, or say function do not come out, in this aspect still want to try only.

Compound interest adds to the project