📄 page_119.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> <html> <head> <title>page_119</title> <link rel="stylesheet" href="reset.css" type="text/css" media="all"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> </head> <body> <table summary="top nav" border="0" width="100%"> <tr> <td align="left" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_118.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_119</strong></td> <td align="right" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_120.html">next page ></a></td> </tr> <tr> <td align="left" colspan="3" style="background: #ffffff; padding: 20px;"> <table border="0" width="100%" cellpadding="0"><tr><td align="center"> <table border="0" cellpadding="2" cellspacing="0" width="100%"><tr><td align="left"></td> <td align="right"></td> </tr></table></td></tr><tr><td align="left"><p></p><table border="0" cellspacing="0" cellpadding="0" width="100%"><tr><td align="right"><font face="Times New Roman, Times, Serif" size="2" color="#FF0000">Page 119</font></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="17"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">Problem-Solving Case Study Painting Traffic Cones</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3"><img src="864732c70df32e8fff3b2bac66365edc.gif" border="0" alt="0119-01.gif" width="122" height="119" /></font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">Problem: The Hexagrammum Mysticum Company manufactures a line of traffic cones. The company is preparing to bid on a project that will require it to paint its cones in different colors. The paint is applied with a constant thickness. From experience, the firm finds it easier to estimate the total cost from the area to be painted. The company has hired you to write a program that will compute the surface area of a cone and the cost of painting it, given its radius, its height, and the cost per square foot of three different colors of paint.</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">Output: The surface area of the cone in square feet, and the costs of painting the cone in the three different colors, all displayed in floating point form.</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">Discussion: From interviewing the company's engineers, you learn that the cones are measured in inches. A typical cone is 30 inches high and 8 inches in diameter. The red paint costs 10 cents per square foot; the blue costs 15 cents; the green costs 18 cents. In a math text, you find that the area of a cone (not including its base, which won't be painted) equals</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3"><img src="8a0252749898de9ee2e836f5274591ff.gif" border="0" alt="0119-02.gif" width="76" height="28" /></font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">where <i>r</i> is the radius of the cone and <i>h</i> is its height.</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Times New Roman, Times, Serif" size="3">The first thing the program must do is convert the cone measurements into feet and divide the diameter in half to get the radius. Then it can apply the formula to get the surface area of the cone. To determine the painting costs, it must multiply the surface area by the cost of each of the three paints. Here's the algorithm:</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table><table border="0" cellspacing="0" cellpadding="0"><tr><td rowspan="5"></td> <td colspan="3" height="12"></td> <td rowspan="5"></td></tr><tr><td colspan="3"></td></tr><tr><td></td> <td><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">Set聽heightInFeet聽=聽heightInInches聽/聽12<br />Set聽diameterInFeet聽=聽diameterInInches聽/聽12<br />Set聽radius聽=聽diameterInFeet聽/聽2<br />Set聽surfaceArea聽=聽pi聽</font><font face="Symbol" size="2">*</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">聽radius聽</font><font face="Symbol" size="2">*</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">聽sqrt(radius</font><font face="Symbol" size="2">*</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">radius聽+聽heighInFeet</font><font face="Symbol" size="2">*</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">heightInFeet)<br />Set聽redCost聽=聽surfaceArea聽</font><font face="Symbol" size="2">*</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">聽0.10<br />Set聽blueCost聽=聽surfaceArea聽</font><font face="Symbol" size="2">*</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">聽0.15<br />Set聽greenCost聽=聽surfaceArea聽</font><font face="Symbol" size="2">*</font><font face="Courier New, Courier, Mono New, Courier, Mono" size="2">聽0.18<br />Print聽surfaceArea<br />Print聽redCost<br />Print聽blueCost<br />Print聽greenCost</font></td><td></td></tr><tr><td colspan="3"></td></tr><tr><td colspan="3" height="1"></td></tr></table></td></tr></table><p><font size="0"></font></p>聽 </td> </tr> <tr> <td align="left" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_118.html">< previous page</a></td> <td align="center" width="40%" style="background: #EEF3E2"><strong style="color: #2F4F4F; font-size: 120%;">page_119</strong></td> <td align="right" width="30%" style="background: #EEF3E2"><a style="color: blue; font-size: 120%; font-weight: bold; text-decoration: none; font-family: verdana;" href="page_120.html">next page ></a></td> </tr> </table> </body> </html>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -