習(xí)題課三-計(jì)算機(jī)基礎(chǔ)及C語(yǔ)言

C語(yǔ)言程序設(shè)計(jì)習(xí)題課三1讀程序1#include<stdio.h>intf(intn){ staticints=1; while(n)s*=n--; returns;}voidmain(){ inti,j; i=f(3); j=f(5); printf("i=%dj=%d\n",i,j);}i=6j=7202讀程序2#include<stdio.h>voidtrans(intm,intn);voidmain(){ inti; printf("\n%d->-",-21); trans(21,2); printf("\n%d->",123); trans(123,16); printf("\n");}voidtrans(intm,intn){ inti; if(m>=n){ i=m%n; trans(m/n,n); } elsei=m; if(i<10)printf("%d",i); elseprintf("%c",'A'+i-10);}-21->-10101123->7B3讀程序3#include<stdio.h>inta=10;intf(inta){ intb=0; staticintc=3; a++;++c;++b; returna+b+c;}voidmain(){ inti; for(i=0;i<2;i++) printf("%5d",f(a)); printf("\n");}16174讀程序4#include<stdio.h>intfunc(inta,intb){ staticintm=0,i=2; i+=m+1; m=i+a+b; return(m);}voidmain(){ intk=4,m=1,p; p=func(k,m); printf("%d,",p); p=func(k,m); printf("%d\n",p);}8,175讀程序5#include<stdio.h>intfun(intn);voidmain(){intx;x=fun(10);printf("%d\n",x);}intfun(intn){ ints; if((n==1)||(n==2)) s=2; else s=n+fun(n-1); return(s);}546讀程序6#include<stdio.h>#defineMAX5voidfun1();voidfun2();voidfun3();voidfun4();inta[MAX],k;voidmain(){ fun1(); fun3(); printf("\n"); fun2(); fun3(); printf("\n");}voidfun1(){ for(k=0;k<MAX;k++) a[k]=k+k;}voidfun2(){ inta[MAX],k; for(k=0;k<5;k++) a[k]=k;}voidfun3(){ intk; for(k=0;k<MAX;k++)printf("%d",a[k]);}02468024687讀程序7#include<stdio.h>intgcd(intm,intn);voidmain(){ printf("Gcd=%d\n",gcd(24,36));}intgcd(intm,intn){ if(m==n) returnm; elseif(m>n)returngcd(m-n,n); else returngcd(m,n-m);}Gcd=128讀程序8#include<stdio.h>inta1=300,a2=400;voidsub1(intx,inty){ a1=x; x=y; y=a1;}voidmain(){ inta3=100,a4=200;sub1(a3,a4);sub1(a1,a2);printf("%d,%d,%d,%d\n",a1,a2,a3,a4);}100,400,100,2009程序填空題1下面程序用于計(jì)算cos(x)值，依據(jù)公式為：要求輸入x（以角度計(jì)）和誤差值epsil。當(dāng)epsil<=0時(shí)程序停止執(zhí)行。程序#include<stdio.h>#definePI3.141526

10程序填空題1doubleex(doublex,doubleepsil){ doublet=1.0,s=0.0; intn=1; while((t>=0.0 ?t:-t)>epsil){ s+=t;

(1);

(2); } returns;}voidmain(){ doublex,epsil; printf("Inputx,epsil:\n"); scanf("%lf%lf",&x,&epsil); while(epsil>0.0) { x*=PI/180; printf("cos(%f)=%f\n“ ,x,ex(x,epsil)); printf("Inputx,epsil:\n"); scanf("%lf%lf",&x,&epsil); }}（1）t=-t*x*x/(2*n)/(2*n-1);（2）n++;11程序填空題2以下程序求a數(shù)組中的所有素?cái)?shù)的和，函數(shù)isprime用來(lái)判斷自變量是否為素?cái)?shù)。素?cái)?shù)是只能被1和本身整除且大于1的自然數(shù)。程序#include<stdio.h>intisprime(intx);12程序填空題2voidmain(){ inta[10]={0}; inti,sum=0;printf("Enter10num:\n");for(i=0;i<10;i++) scanf("%d",&a[i]);for(i=0;i<10;i++) if((1)) { printf("%d",a[i]); sum+=a[i]; } printf("\nThesum=%d\n",sum);}intisprime(intx){ inti; for(i=2;i<=x/2;i++) if(x%i==0)

(2);

(3);}（1）isprime(a[i])（2）return0（3）return113程序填空題3用遞歸法將一個(gè)整數(shù)n轉(zhuǎn)換成字符串。如輸入整數(shù)483，則輸出字符串“483”。

程序：#include<stdio.h>voidconvert(intn){ if((n/10)!=0) convert((1)); putchar(n%10+'0');}14程序填空題3#include<stdio.h>voidconvert(intn){ if((n/10)!=0)convert((1)); putchar(n%10+'0');}voidmain(){ intnum; printf("\n輸入整數(shù)：");scanf("%d",&num); printf("\n輸出是：");

if(num<0) { putchar('-'); num=-num; }

(2)； printf("\n");}(2)（1）n/10（2）conv(num)15程序填空題4函數(shù)fun，其功能是求兩個(gè)整數(shù)的最大公約數(shù)intfun(intx，inty){inta，b，t，r；a=x；b=y；while((1)){ t=b;

(2);

(3);}return(b)；}（1）a%b>0（2）b=a%b（3）a=b16程序填空題5輸入一個(gè)無(wú)符號(hào)整數(shù)后求出它的各位數(shù)之和并輸出。例如若輸入123，則將各位之和6(即1+2+3)輸出。#include<stdio.h>(1)f(unsignedintnum);voidmain(){ unsignedintn;scanf("%d",&n);printf("%u的各位數(shù)