C语言习题答案第1章1选择题12 345CBABD2填空题(1)main (2) main (3) 有穷性、确定性、有零个或多个输入、有一个或多个输出、有效性(4) 顺序、分支和循环(5) 自顶向下，逐步细化、模块化设计、限制使用goto语句第2章1选择题12 345 67 890 12 34 5ACCDA DDBBA BBACB 2、填空题 (1) 数字、字母、下划线 (2)0 (3) 4、8 (4) (a+b)*c/(a-b) (5) 60 （6）16（7）9 （8）6、4、2 （9）0 （10）10、6 （11）12、4 （12）（13） 0 （14）16 （15）3、编程题（1）编写一个程序求各种类型数据的存储长度。#include main()printf(int:%d byten,sizeof(int);printf(short int:%d byten,sizeof(short int);printf(long int:%d byten,sizeof(long int);printf(float:%d byten,sizeof(float);printf(double:%d byten,sizeof(double);printf(long double:%d byten,sizeof(long double);printf(char:%d byten,sizeof(char);（2）#include main()float k;printf(input the km:);scanf(%f,&k);printf(mile:%fn,k/RAT);第3章1选择题 12 345 67 890(1) (10)：DDCDD DCDCC 2解析题(1) x=170,x=170,x=252,x=aa,x=170 x=170,x=170,x=170,x=%6d a=513.789185,a=(2) a=3y=71.82c1=Ac2=a3编程题(1)main() int x,y; scanf(%d%d,&x,&y); printf(商数=%d,余数=%d,x/y,x%y); (2)main() double x,y,z,avg; scanf(%lf%lf%lf,&x,&y,&z); avg=(x+y+z)/3; printf(%.1f,avg);第4章 1选择题(1)(10) CCAAD CCABD 2填空题(1)a0&b0|a0&c0|b0&c0ab|a5|-a5(a0) 1 !(x=0&x=A&ch=Z ch=ch-32(5) x2 x-1 y=-1 ;(6) a+bc&a+cb&b+ca a=b&a=c a=b|a=c|b=c(7) x0 c=x/10 y!=-23编程题(1)#include main() int x; printf(please input a number:); scanf(%d,&x); if(x%2=0) printf(x is a even number); else printf(x is a odd number);(2)#include main() int x,y; printf(please input a number:); scanf(%d,&x); if(x-5 & x0 & x10) y=x+1; printf(%d,y); else printf(the number is error);(3)#include main() int a,m; printf(please input a number:); scanf(%d,&a); switch(a/10) case 0: case 1: case 2:m=1;break; case 3:m=2;break; case 4:m=3;break; case 5:m=4;break; default:m=5;break; printf(%d,m);(4)#include main() float price,tax; printf(please input the price of product:); scanf(%f,&price); if(price=10000) tax=price*0.05; else if(price=5000) tax=price*0.03; else if(price=1000) tax=price*0.02; else tax=0; printf(%f,tax);(5)#include main() float score; printf(please input the score of student:); scanf(%f,&score); if(score=85) printf(VERY GOOD); else if(score=60) printf(GOOD); else printf(BAD);（6）# include main () int x,y,z;printf(input two number:);scanf(%d%d,&x,&y);if(x99 | y99)printf(input data error!n);elsez=(x/10)*1000+(y/10)*100+(x%10)*10+y%10; printf(%dn,z);第5章1选择题(1)d (2) c (3)a (4)d (5)a (6)d (7)d (8)b (9)d (10)b(11)c (12)a (13)d (14)d (15)c2填空题(1) fahr celsius=5.0/9*(fahr-32) fahr+=step (2) 5、4、6 (3) 3*i-2(4) y- z*=x (5) 852 (6) j+ i%j=0 j=i(或j=i) (7)sumk sum=k j-2 (8) s=0 p=1 j=i 3改错题 (1) 第一处改正： For改为for 第二处改正：for(k=1;k=4;k+)或for(k=0;k=eps第三处改正：r*2(4) 第一处改正：&n第二处改正：= =(5) 第一处改正：t=m/10改为t=m%10第二处改正：t=0改为t=0第三处改正：m=m%10改为m=/104编程题(1) 分式累加和。#include main()int s;float n,t,sum;t=1; sum=0; n=1; s=1.0;while(n=100) sum=sum+t; n=n+1; s=-s; t=s/n;printf(sum=%10.6fn,sum);(2)110的阶乘#include main() int i; long int n=1; for(i=1;i=10;i+) n=n*i; printf(i%5=0?%2d!=%-10ldn:%2d!=%-10ld,i,n); (3)由*组成的等腰三角形#include main() int n,i,j; scanf(%d,&n); for(i=1;i=n;i+) for(j=1;j=n+i-1;j+) if(j=n-i) printf( ); else printf(*); printf(n); (4)完数main() int m,s,i; for(m=2;m1000;m+) s=0; for(i=1;im;i+) if(m%i)=0) s=s+i; if(s=m) printf(%d its factors are ,m); for(i=1;im;i+) if(m%i=0) printf(%d,i); printf(n); (5)打靶#include main() int h10,h7,h5; for(h10=0;h10=8;h10+) for(h7=0;h7=8;h7+)for(h5=0;h5=8;h5+)if(h10+h7+h5=8 & h10*10+h7*7+h5*5=