C语言程序设计教程第六章课后习题参考答案.docx

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1、P1581求三个实数最大值#includefloatmax(float,float,float);intmain(){floata,b,c,m;printf("请输入三个实数:");scanf("%f%f%f",&a,&b,&c);printf("最大数为%f",max(a,b,c));return0;}floatmax(floata,floatb,floatc){floatt;if(a>b&&a>c)t=a;elseif(b>a&&b>c)t=b;elset=c;returnt;}P1582求最大公约数最小公倍数#includeintfun1

2、(inta,intb);intfun2(inta,intb);intmain(){inta,b;printf("请输入两个整数:");scanf("%d%d",&a,&b);printf("最大公约数为:%d",fun1(a,b));printf("最小公倍数为:%d",fun2(a,b));}intfun1(inta,intb){intt,r;if(a

3、全数#includevoidwan(intn);voidmain(){intn;for(n=1;n<1000;n++)wan(n);printf("");}voidwan(intn){inti,s=0;for(i=1;i<=n/2;i++){if(n%i==0)s=s+i;}if(n==s)printf("%dt",n);}P1584无暇素数#include#includeintnixvshu(intn);intisPrime(intn);intmain(){intn,t;printf("无暇素数:");for(n=100

4、;n<=999;n++){t=nixvshu(n);if(isPrime(n)&&isPrime(t))printf("%dt",n);}printf("");return0;}intnixvshu(intn){intx=0;while(n){x=x*10+n%10;n=n/10;}returnx;}intisPrime(intn){inti;for(i=2;i<=sqrt(n);i++)if(n%i==0)return0;returnn;}P1587递归函数#includeintY(intn){if(n==0)return0;if(n==1)return1;

5、if(n==2)return2;elsereturn(Y(n-1)+Y(n-2)+Y(n-3));}intmain(){intn,k=0;for(n=0;n<=19;n++){printf("%dt",Y(n));k++;if(k%5==0)printf("");}return0;}P1246分解质因数#include#includeintisPrime(intn);intzhi(intm);voidfenjie(int);intmain(){intn;printf("请输入一个正整数:");scanf("%d",&n);if(isPrime(

6、n)){printf("%d=1*%d",n,n);}else{fenjie(n);printf("");}return0;}intisPrime(intn){inti;for(i=2;i<=sqrt(n);i++){if(n%i==0)return0;}return1;}intzhi(intn){intm;for(m=2;m<=n;m++){if(isPrime(m)&&(n%m==0))break;}returnm;}voidfenjie(intn){intm;printf("%d=%d",n,zhi(n));while(n>zhi(n)){m=zhi(n);n=n/m;

7、printf("*%d",zhi(n));}}P471输出闰年#includeintf(intyear);intmain(){intyear,k=0;for(year=1900;year<=2000;year++){if(f(year)){printf("%dt",year);k++;if(k%5==0)printf("");}}return0;}intf(intyear){if((year%4==0&&year%100!=0)

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