学步园

作者: selfimpr

博客: http://blog.csdn.net/lgg201

邮箱: lgg860911@yahoo.com.cn

<C语言程序设计-现代方法>----示例及练习题----第二章--C语言基本概念

声明:

部分示例代码为书中源代码.

其他原创代码多数对原题要求有所改动.

page9: pun.c

#include <stdio.h></p> <p>int main() {<br /> printf("To C, or not to C: that is the question./n%.3f", 3.234666666);<br /> return 0;<br /> }<br />

page 18: dweight.c

#include <stdio.h><br /> #define CUBIC_IN_PER_LB 166</p> <p>int main() {</p> <p> int height = 0;<br /> int length = 0;<br /> int width = 0;<br /> int volume = 0;<br /> int weight = 0;</p> <p> /*<br /> * height = 8;<br /> * length = 12;<br /> * width = 10;<br /> */<br /> int i = 0;<br /> while(i < 5) {<br /> printf("please input height:/n");<br /> scanf("%d", &height);<br /> printf("please input width:/n");<br /> scanf("%d", &width);<br /> printf("please input length:/n");<br /> scanf("%d", &length);<br /> volume = height * length * width;<br /> weight = (volume + CUBIC_IN_PER_LB - 1) / CUBIC_IN_PER_LB;</p> <p> printf("Dimensions: %dx%dx%d/n", length, width, height);<br /> printf("Volume (cubic inches): %d/n", volume);<br /> printf("Dimensional weight (pounds): %d/n", weight);<br /> }</p> <p> return 0;<br /> }

page 22: celsius.c

#include <stdio.h></p> <p>#define PERZING_PT 32.0<br /> #define SCALE_FACTOR (5.0 / 9.0)</p> <p>int main() {<br /> float fahrenheit, celsius;<br /> printf("Enter Fahrenheit temperature: ");<br /> scanf("%f", &fahrenheit);</p> <p> celsius = (fahrenheit - PERZING_PT) * SCALE_FACTOR;<br /> printf("Celsius equivalent: %.1f/n", celsius);</p> <p> return 0;<br /> }<br />

练习3: 编写一个程序, 程序要使用printf在屏幕上显示出下面的图形:

        *
       *
      *
*   *
 * *
  *

#include <stdio.h></p> <p>int main() {<br /> int size = 1;</p> <p> printf("please enter the size of this fit: ");<br /> scanf("%d", &size); </p> <p> int times = size * 3;<br /> int up_space_by_down = times * 2 - 1;</p> <p> int i = 0;<br /> for(; i < times; i ++) {<br /> int space_amount = times - i - 1 + up_space_by_down;<br /> int j = 0;<br /> for(; j < space_amount; j ++) {<br /> printf(" ");<br /> }<br /> printf("*/n");<br /> }</p> <p> i = 0;<br /> for(; i < times; i ++) {<br /> int left_space_amount = i;<br /> int center_space_amount = 2 * ( times - i - 2) + 1;<br /> int j = 0;<br /> for(; j < left_space_amount; j ++) {<br /> printf(" ");<br /> }<br /> if(center_space_amount >=1) {<br /> printf("*");<br /> }<br /> j = 0;<br /> for(; j < center_space_amount; j ++) {<br /> printf(" ");<br /> }<br /> printf("*/n");<br /> }</p> <p> return 0;<br /> }<br />

练习5, 7, 9: 编写一个计算球体体积的程序, 其中球体半径为10m, 参考公式v=4/3派r^3. 注意, 分数4/3应写成4.0/3.0

#include <stdio.h><br /> #define PAI 3.14159262453897</p> <p>int main() {<br /> printf("please enter the ball's radii: ");<br /> int radii = 0;<br /> scanf("%d", &radii);<br /> float cubage = 4.0 / 3.0 * PAI * radii * radii * radii;<br /> printf("The ball that radii is %d, its cubage is %f", radii, cubage);<br /> return 0;<br /> }