c语言编程答案实验四

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1、实验四编号1#includevoidmain(){inti=0;while(i++<=1)printf("%2d",i);printf("%2d",i);}实验四编号2#includevoidmain(){inti=0;doprintf("%2d",i);while(i++<=1);printf("%2d",i);}实验四编号3#includevoidmain(){inta,b;for(a=1,b=1;a<100;a++){if(b>=20)break;if(b

2、%3==1){b+=3;continue;}b+=5;}printf("a=%d,b=%d",a,b);}实验四编号4#includevoidmain(){floati,sum;for(i=1;i<=100;i++)sum+=1/i;printf("1+1/2+1/3+...+1/100=%f",sum);}实验四编号5#includevoidmain(){inti,sum=0;i=0;while(1){i++;if(i>=100)break;if(i%2==0)continue

3、;sum+=i;}printf("1+3+5+...+99=%d",sum);}实验四编号6#includevoidmain(){inti,sum=0,fac=1;for(i=1;i<=99;i+=2){fac=i*(i+1)*(i+2);sum+=fac;}printf("1*2*3+3*4*5+...99*100*101=%d",sum);}实验四编号7#includevoidmain(){inti;for(i=1;i<=9;i++)if(i*i%10==i)printf("

4、%d,",i);for(i=10;i<=99;i++)if(i*i%100==i)printf("%d,",i);if(100*100%1000==100)printf("%d,",100);}实验四编号8#includemain(){intm,a,b,c,i;for(m=100,i=0;m<=999;m++){a=m/100;b=m/10%10;c=m%10;if(a+b+c==11)i++;}printf("count=%d",i);}实验四编号9#includevoidma

5、in(){inta,s=0;scanf("%d",&a);while(a/10!=0){{if(a%10==2)s++;}a/=10;}if(a%10==2)s++;printf("count=%d",s);}实验四编号10#include#includemain(){inti=200,j,num=0,sum=0;for(i;;){for(j=2;j<=sqrt(i);j++)if(i%j==0)break;if(j>sqrt(i)){sum+=i;num++;if(num>=10

6、)break;}i++;}printf("大于200的素数之和:%d",sum);}实验四编号11#includevoidmain(){inta,b,c,x;for(x=100;x<=999;x++){a=x/100;b=x%100/10;c=x%10;if(x==a*a*a+b*b*b+c*c*c)printf("%d",x);}}实验四编号12#includevoidmain(){inti,j=0,a=0;for(i=0;i<5;i++)do{if(j%3)break

7、;a++;j++;}while(j<10);printf("j=%d,a=%d",j,a);}实验四编号13#includevoidmain(){intm,n;scanf("%d%d",&m,&n);while(m!=n){while(m>n)m-=n;while(n>m)n-=m;}printf("m=%d",m);}实验四编号14#includevoidmain(){inti,j,k,count;count=0;for(i=1;i<=9;i++)for(j=0;j<=9;

8、j++){if(i==j)continue;for(k=0;k<=9;k++)if(k!=i&&k!=j)count++;}printf("这样的三位数共有%d个",count);}实验四编号15#includevoidmain(){inta,b,c,d,n;for(n=1;n<=100;n++){a=n/10;b=n%10;c=a+b;d