《《C语言程序设计教程》三、四、五章习题参考答案.docx》由会员分享，可在线阅读，更多相关《《C语言程序设计教程》三、四、五章习题参考答案.docx（4页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、习题参考答案第三章顺序结构程序设计一、选择题l.C 2.C3.C4. D 5.B二、填空题1. printf； scanf2. ASCII 码3. 取地址；取变量a的地址4. .顺序5. 8, 10, 16三、编程题1.ttinclude void main()printf (*n);printf (hello world! n/z);printf(*n);2.ttinclude void main()float math, english, computer, sum=0, average;printf (请输入三门课成绩:n);scanf&math, &english, &computer
2、);sum=math+english+computer;average=sum/3;printf (zzsum=%. 2f, average=%. 2fn, sum, average);3.#include void main()char cl,c2;printf (请输入两个字符型数据(不加空格)：n);scanf (%c%c, &cl, &c2);printf (z/%c-%dn%c-%dn/z, cl, cl, c2, c2);第四章选择结构程序设计选择题1. C 2.B3.B4.C二、填空题2. 1； 03. if； switch4. 常量或常量表达式5. a+bc&a+cb&b+ca
3、三、编程题1.#includevoid main ()(int x;scanf (%d, &x);if (x % 2 = 0)printf (%d 为偶数n, x);elseprintf (%d 为奇数n，x);)2.#includevoid main()(float x, y;printf (请输入x的值n)；scanf (%f, &x);if (x0)y=x*x+l;else if (x=0)y=0；elsey二一x*x+l;printf (x=%. 2fny=%. 2fn, x, y);)#includevoid main ()int day, month, year, sum, lea
4、p;printf (请输入年、月、日n);scanf (zz%d, %d, %d, &year, &month, &day);switch (month) /*先计算某月以前月份的总天数*/ case 1:sum=0;break;case 2:sum=31;break;case 3:sum=59;break;case 4:sum=90;break;case 5:sum=120;break;case 6:sum=151;break;case 7:sum=181;break;case 8:sum=212;break;case 9:sum=243;break;case 10:sum=273;brea
5、k;case 11:sum=304;break;case 12:sum=334;break;default:printf(error!);break;sum=sum+day;if (year%400=0) | | (year%4-0 &year%100!=0) leap=l;else leap=0;if(leap=l &month=2) /*如果是闰年且月份大于2,总天数加一天*/ SUIT1+；printf (z，%d 年%d 月(1 日是该年的第d 天。n，year, month, day, sum);第五章循环结构程序设计一、选择题1.B2. A 3.D4. A 5. C二、填空题1.
6、break2. -k3. 1 2 4 5 7 8 104. 205. abc 三、编程题1.#includestdio.hvoid main ()int i, a, b, c;for(i=100;i=999;i+)a=i/100;b=(i%100)/10;c=(i%100)%10;if (i=a*a*a+b*b*b+c*c*c) printf(%dn，i);)ttinclude void main ()char ch;int letter,digit, space, others;letter=0;digit=0;space=0;others=0;while(ch=getchar( )!=#)
7、if (ch=a &ch二z | | ch=A &ch二Z) letter+;else if (ch=O&ch二9)digit+;else if ( ch=，)space+;elseothers+;)printf (%d, %d, %d, :%dn，letter, digit, space, others); )2.ttinclude void main ()int i;for (i=l;i=100;i+)if(i%4=0&i%6=0)printf (4d，i);printf(n);)3.ttinclude void main ()int i=l;float sum=0;while(i=10)
8、sum+=l. 0/i;i+；)printf(%fn，sum);)4.ttinclude void main ()int i=l, n=0;while(i=40)|printf(%4d，i);n+;if(n%5=0)printf (n);i+=2;)5.ttinclude void main ()(int a, b, c, n=0;for(a=0;a=20;a+)for (b=0;b33;b+)for (c=0;c=100;c+)if (5*a+3*b+c=100)(printf (公鸡:3d 母鸡:3d 小鸡%3dn, a, b, c); n+;)printf (一共有%d 种买法。n, n);)6.ttinclude main ()int time=60, i=l;printf (比赛还剩下最后60秒！ ！n); dotime=time一一;printf (剩余%2d 秒 ，time);i=i+;if (time%5=0)printf (n);while(i=60);printf(时间已到，终止比赛n)；