跪求各位大哥帮忙看看程序怎么写，小弟要交，不然这学期这门课就过不了

 

Key Concepts: file output, formatting

One model of population growth gives the current population, P, in terms of an initial population P₀, a constant k, and a time t in years (measured from t = 0, when P₀ was measured). The equation for this model is as follows:

P = P₀e^kt

This model reasonably estimated the U.S. population from 1790 to 1860 with k = 0.0298. The 1790 population was 3.9 million.

Your task is to write a program to generate a .csv file that has a line for each year the above model can reasonably estimate. Each line should have the year, a comma, and the estimated population in that year formatted with three decimal places. The first few lines should look like this:

1790,      3.900
1791,      4.018
1792,      4.140
1793,      4.265
1794,      4.394
1795,      4.527

Once you've successfully generated this file, wirte fortran code to generate a graph of the data. The graph should be properly labeled.

Then change the program to generate a second CSV file and generate a new graph. This time, change the 1790 population to a value of your choosing and change the growth constant to -0.03.

Report

Prepare a report with the following sections (use the headings provided and add more sections in the same style as necessary):

·         Code

·         Original output file

·         Graph from the original file

·         Second output file

·         Graph for the second file

先帮忙看看这个，星期一要交，跪求各位大侠