大一期末考试c语言操作题答案

1、ball.c#include stdio.h#define PI 3.int main()double r,volume,surface;scanf(%lf,&r);volume=4*PI*r*r*r/3;surface=4*PI*r*r;printf(体积=%10.2fn,volume);printf(表面积=%10.2fn,surface);root.c#include#includeint main() float a, b, c, x1, x2,delta; scanf(%f%f%f,&a,&b,&c); delta = b*b-4*a*c; x1 = (-b+sqrt(delta)/

2、(2.0*a); x2 = (-b-sqrt(delta)/(2.0*a); printf(x1=%f,x2=%fn,x1,x2);exp04.c#include stdio.hint main()int n,x,y,z,sum,product;scanf(%D,&n);x=n/100;y=(n-x*100)/10;z=n%10;sum=x+y+z;product=x*y*z;printf(sum=%d,product=%dn,sum,product);return 0;year.c#include stdio.hint main()int year;scanf(%d,&year);if(ye

3、ar3000)printf(ERROR!);return 0;if(year % 400 =0 | (year %4=0 & year %100 !=0) printf(%d是闰年,year);else printf(%d是平年,year); return 0; triangle.c#include stdio.h#include math.hint main()int a,b,c;double s,p;scanf(%d%d%d,&a,&b,&c);if(a1) | (b1) | (cc)&(a+cb)&(b+ca)p=(a+b+c)/2;s=sqrt(p*(p-a)*(p-b)*(p-c);

4、printf(此三角形的面积为%8.2f,s);return 0;else printf(不能组成三角形); add.c#include stdio.h#include math.hint main()int a,b,c;double s,p;scanf(%d%d%d,&a,&b,&c);if(a1) | (b1) | (cc)&(a+cb)&(b+ca)p=(a+b+c)/2;s=sqrt(p*(p-a)*(p-b)*(p-c);printf(此三角形的面积为%8.2f,s);return 0;else printf(不能组成三角形); #include stdio.hint main(vo

5、id)int n,sum,i=1;printf(please input a number:);scanf(%d,&n);if(n0)printf(ERROR!);for(i=1;i=n;i+)sum += i;return 0;product.c#include int main(void)int i;int n;int p=1;scanf(%d,&n);if (n=0) printf(ERROR);elsefor(i=1;i=n;+i)p*=i;printf(%d,p);return 0;Sushu.c#includeint main(void)int i;int n;int sum=0;

6、scanf(%d,&n);if (n=2) printf(ERROR);elsefor(i=2;in;+i)if(0=n%i)break;if(i=n)printf(%d是素数n,n);elseprintf(%d不是素数n,n);return 0;Gcd.c#include int main (void)int m, n, p, gcd,lcm;scanf (%d %d, &m, &n);if(m=0|n99;num-)a=num/100;b=num/10%10;c=num%10;for(e=2;e10;e+)for(d=0;d10;d+)if(num*e=d*1000+c*100+b*10+

7、a)printf(abcd=%d,num*10+d);return;Sumsushu.c# include int f(int n) int i; int sum=0; if(n!=2) for(i=2;in;i+) if(n%i=0) sum=0; break; if(n%i!=0) sum=1; if(n=2) sum=1; return sum;int main () int n,a=0,i; scanf(%d,&n);if(n=1)printf(ERROR);elsefor(i=2;i=n;i+)if(f(i)=1)a+=i;printf(素数和=%d,a); return 0;Fac

8、t.c#include int zuheshu(int n)int i = 1;int temp1 = 1,temp2 =1;for (i=1;i=2;i+)temp1 *= n-i+1;temp2 *=i;temp1 /=temp2; return temp1;int main() int n; scanf(%d,&n); if(n=1)printf(ERROR);else int sum;sum=zuheshu(n); printf(angles=%d,sum); Hanoi.c#includeint sum=0;void hanoi(char a, char b, char c, int

9、 n)if(n=1)sum+;elsehanoi(a,c,b,n-1);sum+;hanoi(c,b,a,n-1);int main()int i,n;scanf(%d,&n);if(n=0)printf(ERROR);elsehanoi(A,C,B,n); printf(移动次数为%dn, sum);return 0;Fibonaci.c#includeint Fib(int n) if (n=1|n=2) return 1; return Fib(n-1)+Fib(n-2);int main() int m,k;scanf(%d%d,&m,&k);if(m0&m=k&k50) int i;

10、 long int sum=0; for(i=m;i=k;i+)sum+=Fib(i);printf(sum=%ldn,sum);elseprintf(ERROR);return 0;Bubble.c#include int main(void) int n; scanf(%d,&n); if(n0&n10) int i,j,k,mn; for(i=0;in;i+) scanf(%d,&mi); for(i=0;in-1;i+) for(j=0;jmj+1) k=mj;mj=mj+1;mj+1=k; for(i=0;in;i+) printf(%dt,mi); else printf(ERRO

11、R);Count.c#include #include #define N 100int main() int n,m; scanf(%d%d,&n,&m); if(n0&n0&m20) int aN = 0; int i; int j; for(i = 0; i 1) i = (i + m - 1) % n; printf(%dt,ai); for(j = i+1; j n; j+) aj-1 = aj; n-; if(i = n) i = 0; printf(%dt, ai); else printf(ERROR); return 0; List-find.c#include #defin

12、e NUM 30void mybubble(int *pArr, int num)/使用冒泡排序法对数组pArr进行从小到大排序，num为数组元素的个数int i, j, t;for (i = 0; i num - 1; i+)for (j = 0; j pArrj + 1)t = pArrj + 1;pArrj + 1 = pArrj;pArrj = t;int myfind(int *pArr, int key, int num)int low = 0,high = num - 1,mid; /二分法查找 while (lowpArrmid) low = mid + 1; /查找成功，返回该关键字值所在位置的下标，若查找失败则返回-1 else if(keypArrmid) high = mid - 1; else return mid; return -1;int main()int MANUM = 34, 76, 23, 67, 345, 234, 21, 78, 172, 90 ;int nums = 10;/数组元素个数int mkey;int k;mybubble(MA, nums);scanf(%d, &mkey);/输入一个整数k = myfind(MA, mkey, nums);if (k 0)printf(ERRORn);else