第1章习题参考答案1.单项选择题(1)A(2)C(3)D(4)C(5)B2.填空题(1)函数(2)主函数(main)(3)printf(),scanf()第2章习题参考答案1.单项选择题1-5CBCCC6-10CDCDC11-13DBB2.填空题(1)1(2)26(3)6,4,2(4)10,6(5)3.000000(6)双精度(double)(7)9(8)字母,数字,下划线(9)13.700000(10)11(11)((m/10)%10)*100+(m/100)*10+m%10(12)0(13)10,9,11(15)(x<0&&y<0)||(x<0&&z<0)||(y<0||z<0)(16)double(17)x==0(18)sqrt(fabs(a-b))/(3*(a+b))(19)sqrt((x*x+y*y)/(a+b))第3章习题参考答案1.单项选择题1-5CCCDD6-10BCDBC11-15BCBBB16A2.填空题(1)用;表示结束(2){}(3)y=x<0?1:x==0?0:-1(4)y%4==0&&y%100!=0||y%400==0(5)上面未配对(6)default标号(7)while,dowhile,for(8)dowhile(9)本次(10)本层3.阅读程序,指出结果(1)yes(2)*&(3)ABother(4)2870(5)2,0(6)8(7)36(8)1(9)3,1,-1,3,1,-1(10)a=12,y=12(11)i=6,k=4(12)1,-24.程序填空(1)x:y,u:z(2)m=n,m!=0,m=m/10(3)t=0,sintmain(){doublex,y;scanf("%lf",&x);if(x<1)y=x;elseif(x>=1.0&&x<10)y=2*x-11;elsey=3*x-11;printf("%lf\n",y);return0;}(2).#includeintmain(){doublex,y,z,min;scanf("%lf%lf%lf",&x,&y,&z);if(x>y)min=y;elsemin=x;if(min>z)min=z;printf("min=%lf\n",min);return0;}(3).#includeintmain(){inty,m,d,flag,s=0,w,i;scanf("%d%d%d",&y,&m,&d);flag=(y%4==0&&y%100!=0||y%400==0);w=((y-1)*365+(y-1)/4-(y-1)/100+(y-1)/400)%7;for(i=1;i<=m;i++){switch(i){case1:s=d;break;case2:s=31+d;break;case3:s=59+d;break;case4:s=90+d;break;case5:s=120+d;break;case6:s=151+d;break;case7:s=181+d;break;case8:s=212+d;break;case9:s=243+d;break;case10:s=273+d;break;case11:s=304+d;break;case12:s=334+d;break;}}if(flag==1&&m>2)s=s+1;s=(w+s)%7;if(s==0)printf("星期日\n");elseprintf("星期%d\n",s);return0;}(4).#includeintmain(){floatp,r;scanf("%f",&p);if(p<=10)r=p*0.1;2elseif(p>10&&p<=20)r=10*0.1+(p-10)*0.075;elseif(p>20&&p<=40)r=10*0.1+10*0.075+(p-20)*0.05;elseif(p>40&&p<=60)r=10*0.1+10*0.075+20*0.05+(p-40)*0.03;elseif(p>60&&p<=100)r=10*0.1+10*0.075+20*0.05+20*0.03+(p-60)*0.015;elseif(p>100)r=10*0.1+10*0.075+20*0.05+20*0.03+40*0.015+(p-100)*0.01;printf("%f\n",r);return0;}(5).#includeintmain(){charc;while((c=getchar())!='\n'){if(c>='a'&&c<='z')c=c-32;putchar(c);}return0;}(6).#includeintmain(){intm,k=2;printf("输入一个正整数:\n");scanf("%d",&m);while(kintmain(){inta,n,s=0,p=0,i;scanf("%d%d",&n,&a);for(i=1;i<=n;i++){p=p*10+a;s=s+p;}printf("%d\n",s);return0;}(8).#includeintmain(){inti,j,k;for(i=1;i<=9;i++)for(j=0;j<=9;j++)for(k=0;k<=9;k++)printf("%5d",100*i+10*j+k);return0;}(9).#include#includeintmain()3{floata=-10,b=10,x,f1,f2,f;f1=(((2*a-4)*a+3)*a)-6;f2=(((2*b-4)*b+3)*b)-6;do{x=(a+b)/2;f=(((2*x-4)*x+3)*x)-6;if(f*f1<0){b=x;f2=f;}else{a=x;f1=f;}}while(fabs(f)>=1e-6);printf("%6.2f\n",x);return0;}(10).#include#includeintmain(){intn=2;doubleeps,t,s=0,x;scanf("%lf%lf",&x,&eps);t=x;s=t;while(fabs(t)>=eps){t=-t*(2*n-3)*x*x/(2*n-2);s=s+t/(2*n);n++;}printf("%d,%lf\n",n,s);return0;}(11).#includeintmain(){unsignedlongs,t=0,p=1;scanf("%u",&s);while(...