参考答案 c语言程序设计 第二版 (丁亚涛 著) 高等教育出版社 课后答案

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1、参考答案习题二(P33)一．单选题1.C2.B3.D4.C5.A6.D7.D8.B9.B10.D11.D12.C13.C.15.A14题最后一句应为printf("%f",d*y);结果为2.2二．填空题1.182.intfloatdouble3.10114.八十六十5.%三．阅读程序题1．10,10,9,102．j=1,i=2k=3,i=3j=3,i=2k=1,i=1习题三(P52)一．单选题1.D2.C3.D4.B5.A6.B7.C8.A9.C10.B11.-1,37777777777,4294967

2、295二．填空题5.L6.-1三．阅读程序题1.666.006.002.x=127,x=127,x=177,x=7fY=123.4567,y=123.46,y=123.456703.2,14.12345.4,36.-6,-6四．程序设计题1．#include"stdio.h"#include"math.h"main(){floata,b,c,d,x1,x2;a=2;b=-3;c=-5;d=b*b-4*a*c;x1=(-b+sqrt(d))/(2*a);x2=(-b-sqrt(d))/(2*a);printf(

3、"x1=%.2f,x2=%.2f",x1,x2);}2.#includemain(){floata,v,s;scanf("%f",&a);v=a*a*a;s=6*a*a;printf("v=%.2f,s=%.2f",v,s);}3.#includemain(){inta,b,c,t;scanf("%d%d%d",&a,&b,&c);printf("a=%d,b=%d,c=%d",a,b,c);t=c;c=b;b=a;a=t;printf("a=%d,b=%d,c

4、=%d",a,b,c);}4.#includemain(){chars1,s2;s1=getchar();s2=s1-32;printf("%c",s2);}习题四(P70)一．单选题1.C2.D3.D4.B5.A6.D7.D8.B9.C10.A11.B12.D13.passwarnerror.14.C15.C16.B17.B18.C二．填空题1.非002.k==03.n%7==0&&n%8==0else三．阅读程序题1.a=1,b=02.c=1四．程序设计题1.#include

5、tdio.h>main(){inta,b;charc;printf("INPUTA+(-*/)B");scanf("%d%c%d",&a,&c,&b);switch(c){case'+':printf("%d+%d=%d",a,b,a+b);break;case'-':printf("%d-%d=%d",a,b,a-b);break;case'*':printf("%d*%d=%d",a,b,a*b);break;case'/':printf("%d/%d=%d",a,b,a/b);bre

6、ak;default:printf("INPUTERROR!");}}2.#includemain(){floatx,y;scanf("%f",&x);if(x==0

7、

8、x==2)y=0;elseif(x>0)y=(x+1)/(x-2);elsey=(x-1)/(x-2);printf("y=%f",y);}3.#includemain(){intg;printf("请输入学生成绩:");scanf("%d",&g);printf("g=%d:",g);switch(g

9、/10){case10:printf("A");break;case9:printf("B");break;case8:printf("C");break;case7:printf("D");break;case6:printf("E");break;default:printf("F");}}4.#includemain(){intx,n=0;scanf("%d",&x);if(x<=0

10、

11、x>=10000)printf("DataError!");else{i

12、f(x<10)n=1;elseif(x<100)n=2;elseif(x<1000)n=3;elsen=4;}printf("n=%d",n);}习题五(P87)一．单选题1.B2.D3.C4.C5.B6.C7.D8.C9.A10.D11.B12.B13.B14.D15.C二．填空题1.for语句while语句do-while语句2.a=14,y=263.k=14,n=-14.395.s=196