c語言-練習(xí)題(帶詳解答案)

《c語言-練習(xí)題(帶詳解答案)》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在教育資源-天天文庫。

1、``一、編程題1.輸入2個整數(shù)，求兩數(shù)的平方和并輸出。#includeintmain(void){intta,b,s;printf("pleaseinputa,b:");scanf("%d%d”,&a,&b);s=a*a+b*b;printf("theresultis%d",s);return0;}2.輸入一個圓半徑r，當(dāng)r>＝0時，計算并輸出圓的面積和周長，否則，輸出提示信息。#include#definePI3.14intmain(void){doubler,area,girth;printf(

2、"pleaseinputr:");scanf("%lf",&r);if(r>=0){area=PI*r*r;girth=2*PI*r;````printf("theareais%.2f",area);printf("thegirthis%.2f",girth);}elseprintf("Inputerror!");return0;}3、已知函數(shù)y=f(x)，編程實現(xiàn)輸入一個x值，輸出y值。2x+1(x<0)y=0(x=0)2x-1(x>0)#includevoidmain(){intx,y;scanf(“%d

3、”,&x);if(x<0)y=2*x+1;elseif(x>0)y=2*x-1;elsey=0;printf(“%d”,y);}4.從鍵盤上輸入一個百分制成績score，按下列原則輸出其等級：score≥90，等級為A；80≤score<90，等級為B；70≤score<80，等級為C；60≤score<70，等級為D；score<60，等級為E。````#includevoidmain(){intdata;chargrade;printf("Pleaseenterthescore:");scanf("%d”,&data);

4、switch(data/10){case10:case9:grade=’A’;break;case8:grade=’B’;break;case7:grade=’C’;break;case6:grade=’D’;break;default:grade=’E’;}printf("thegradeis%c”,grade);}5.編一程序每個月根據(jù)每個月上網(wǎng)時間計算上網(wǎng)費用，計算方法如下：要求當(dāng)輸入每月上網(wǎng)小時數(shù),顯示該月總的上網(wǎng)費用(6分)````#includevoidmain(){inthour;floatfee;printf

5、(“pleaseinputhour:”);scanf(“%d”,&hour);if(hour<=10)fee=30;elseif(hour>=10&&hour<=50)fee=3*hour;elsefee=hour*2.5;printf(“Thetotalfeeis%f”,fee);}6.從鍵盤輸入10個整數(shù)，統(tǒng)計其中正數(shù)、負(fù)數(shù)和零的個數(shù)，并在屏幕上輸出。#includevoidmain(){inta,i,p=0,n=0,z=0;printf("pleaseinputnumber");for(i=0;i<10;i++){

6、scanf("%d,",&a);````if(a>0)p++;elseif(a<0)n++;elsez++;}printf("正數(shù)：%5d,負(fù)數(shù)：%5d,零：%5d",p,n,z);}7、編程序?qū)崿F(xiàn)求1-10之間的所有數(shù)的乘積并輸出。#includevoidmain(){inti；longsum=1;for(i=1;i<=10;i=i+1)sum=sum*i;printf(“thesumofoddis:%ld”,sum);}8.從鍵盤上輸入10個數(shù)，求其平均值。#includevoidmain(){in

7、ta,i,sum=0;floatave;;for(i=0;i<10;i++){scanf("%d",&a);````sum+=a;}ave=(float)sum/10;printf("ave=%f",ave);}9、編程序?qū)崿F(xiàn)求1-1000之間的所有奇數(shù)的和并輸出。#includevoidmain(){inti,sum=0;for(i=1;i<1000;i=i+2)sum=sum+i;printf(“thesumofoddis:%d”,sum);}10.有一個分?jǐn)?shù)序列：2/1，3/2，5/3，8/5，13/8，……編程求

8、這個序列的前20項之和。#includevoidmain(){inti,t,n=20;floata=2,b=1,s=0;for(i=1;i<=n;