第2章程序設(shè)計基礎(chǔ)知識課后習(xí)題答案一、單選題1.B2.B3.A4.B5.D6.D7.D8.A9.C10.B二、程序填空題1.(num1>num2)?num1:num22.value=ch-'0'3.n%10n/100%10n/1000%104.t%60t/60%60t/60/605.(year%4==0&&year%100!=0)||year%400==0(firstWeekday+365-1)%7三、編程題1.#include<stdio.h>#include<stdlib.h>intmain(){doublea,b,c;scanf("%lf\n%lf",&a,&b);c=a*b*0.01;printf("本金:%11.2f元\n",a);printf("利息:%11.2f元\n",c);printf("合計:%11.2f元",a+c);return0;}2.#include<stdio.h>#include<stdlib.h>intmain(){doubleb,h,a;scanf("%lf%lf",&b,&h);a=(b*h)/2;printf("%.2lf",a);return0;}3.#include<stdio.h>intmain(){floatfahrenheit,celsius;printf("請輸入華氏溫度值:");scanf("%f",&fahrenheit);//華氏溫度轉(zhuǎn)攝氏溫度的公式：celsius=(fahrenheit-32)*5/9celsius=(fahrenheit-32)*5/9;printf("%.2f華氏溫度等于%.2f攝氏溫度\n",fahrenheit,celsius);return0;}4.#include<stdio.h>intmain(){floatradius,height,circumference,area,volume;constdoublepi=3.14;printf("請輸入圓柱體的半徑和高度：\n");scanf("%f%f",&radius,&height);circumference=2*pi*radius;printf("圓柱體底面的圓周長為：%.2f\n",circumference);area=pi*radius*radius;printf("圓柱體底面的圓面積為：%.2f\n",area);volume=area*height;printf("圓柱體的體積為：%.2f\n",volume);return0;}5.#include<stdio.h>intmain(){doubleL1,L2,time_in_seconds,average_speed;intH,M,S;printf("輸入開始里程L1:");scanf("%lf",&L1);printf("輸入結(jié)束里程L2:");scanf("%lf",&L2);printf("輸入時間(小時H、分鐘M、秒S):");scanf("%d%d%d",&H,&M,&S);//計算總時間(小時)time_in_seconds=H+M/60+S/3600;//計算平均速度average_speed=(L2-L1)/(double)time_in_seconds;printf("平均速度為:%.2fkm/h\n",average_speed);return0;}6.#include<stdio.h>intmain(){intn,m,p;doubletotal_money=0.0;//剩余錢數(shù)//輸入紅包數(shù)量、每個紅包的大小、弟弟妹妹的紅包大小printf("請輸入紅包數(shù)量：");scanf("%d",&n);printf("請輸入每個紅包的大?。?);scanf("%d",&m);printf("請輸入弟弟和妹妹的紅包大?。?);scanf("%d",&p);//計算剩余錢數(shù)total_money=n*m-2*p;//輸出剩余錢數(shù)printf("小明現(xiàn)在還剩下%.2f元。\n",total_money);return0;}7.#include<stdio.h>intmain(){charQ;printf("請輸入一個大寫字母：\n");scanf("%c",&Q);intQ_ascii=Q;intn=Q_ascii-64;//64是A的ASCII碼值printf("它是字母表中的第%d個字母。\n",n);return0;}8.#include<stdio.h>#include<stdlib.h>intg(intn,inta,intb);intmain(){charnum1,num2,num3;printf("請輸入三個數(shù)字字符（字符'1'~字符'9'）：\n");scanf("%c%c%c"