第七/八周作业

来源：互联网发布：c语言生产随机数的函数编辑：程序博客网时间：2024/05/16 15:15

5-1

#include <iostream>  using namespace std;  void display(){cout<<"hi,everyone"<<endl;}  int main()  { display();              return 0;  }

5-2

#include <iostream>  using namespace std;  double min(double x,double y){return x<y?x:y;}  int main()  { cout<<min(2.0,55.3)<<endl;           return 0;  }

5-3

#include <iostream>  using namespace std;  double circleArea(double);int main(){double area=circleArea(5.0);cout<<"area = "<<area<<endl;return 0;}double circleArea(double r){double pi=3.14;double area=pi*r*r;return area;}

5-4

#include <iostream>  using namespace std;  int sum (int x,int y){int temp;temp=x+y;return temp;}int main(){int a,b,c;a=10;b=5;c=sum(a,b);cout<<a<<" + "<<b<<" = "<<c<<endl;return 0;}

5-5

#include <iostream>  using namespace std;  int ncomp(int i,int j){if(i>j)return 1;if(i==j)return 0;return -1;}int main(){int k=2,y=1;int n=ncomp(y,k);cout<<n<<endl;return 0;}

5-6

#include <iostream>  using namespace std;  int max(int i,int j){int y;return y=i>j?i:j;}int main(){int a,b,c;cout<<"input two numbers: "<<endl;cin>>a>>b;c=max(a,b);cout<<"a= "<<a<<"b= "<<b<<endl;cout<<"max= "<<c<<endl;return 0;}

5-7

#include <iostream>  using namespace std;  int sqrt(int i){i=i*i;return i;}int main(){int t=10;int s=sqrt(t);cout<<"t= "<<t<<'\t'<<"sqrt("<<t<<")= "<<s<<endl;return 0;}

5-8

#include <iostream>  using namespace std;  void swap(int u,int v);int main(){int a=3;int b=4;cout<<"a= "<<a<<'\t'<<"b= "<<b<<endl;swap(a,b);cout<<"a= "<<a<<'\t'<<"b= "<<b<<endl;}void swap(int u,int v){int temp;temp=v,v=u,u=temp;}

5-9

#include <iostream>  using namespace std;  void swap(int &u,int &v);int main(){int a=3;int b=4;cout<<"a= "<<a<<'\t'<<"b= "<<b<<endl;swap(a,b);cout<<"a= "<<a<<'\t'<<"b= "<<b<<endl;}void swap(int &u,int &v){int temp;temp=v,v=u,u=temp;}

5-10

#include <iostream>  using namespace std;  void display(int u,int v){cout<<u<<" "<<v<<endl;return;}int main(){float a;int b ;cin>>b>>a;display(b,a);return 0;}

5-13

#include <iostream>  using namespace std;  long f2(int);long f1(int a){long b,r;b=a*a;r=f2(b);return r;}long f2(int c){long fact=1;for(int i=1;i<=c;i++)fact*=i;return fact;}int main(){int e;long sum=0;for(e=2;e<=3;e++)sum+=f1(e);cout<<"sum= "<<sum<<endl;return 0;}

习题1

#include <iostream>long int Power(int base,int exponent);using namespace std;int main(){    int base,exponent,result;    cout<<"请输入基数："<<endl;    cin>>base;    cout<<"请输入幂的大小："<<endl;    cin>>exponent;    result=Power(base,exponent);    cout <<base<<"^"<<exponent<<" = "<<result<<endl;    return 0;}long int Power(int base,int exponent){    int i,result=1;    for(i=0;i<exponent;i++)    {        result*=base;    }    return result;}

#include <iostream>void judge(int num);using namespace std;int main(){    int num;    cout<<"请输入一个整数： "<<endl;    cin>>num;    judge(num);    return 0;}void judge(int num){    int i,jud=0;    for(i=2;i<num;i++)        if(num%i==0)        {            cout<<"该数不是素数。"<<endl;            jud++;            break;        }    if(jud==0)        cout<<"该数是素数"<<endl;}

#include <iostream>  int fun(int num);  using namespace std;    int main()  {      int num,result;      cout<<"请输入一个整数： "<<endl;      cin>>num;      result=fun(num);      cout <<"颠倒后结果为："<<result<<endl;      return 0;  }  int fun(int num)  {      int result=0;      while(num)      {          result+=num%10;          num=num/10;          result*=10;      }      result/=10;      return result;  }

#include <iostream>void fun(int num);using namespace std;int main(){    int num;    cout<<"请输入分数： "<<endl;    cin>>num;    fun(num);    return 0;}void fun(int num){    while(num<0||num>100)    {        cout<<"输入错误，请重新输入："<<endl;        cin>>num;    }    if(num<60)        cout <<"该学生不及格"<<endl;    else if(num<70)        cout <<"该学生成绩等级为D"<<endl;    else if(num<80)        cout <<"该学生成绩等级为C"<<endl;    else if(num<90)        cout <<"该学生成绩等级为B"<<endl;    else        cout <<"该学生成绩等级为A"<<endl;}

#include <iostream>void fun(int *arr);const int Size=10;using namespace std;int main(){    int arr[Size],i;    cout<<"请分别输入10个学生的分数： "<<endl;    for(i=0;i<Size;i++)    {        cout<<"第 "<<i+1<<" 个："<<endl;        cin>>arr[i];        while(arr[i]<0||arr[i]>100)        {            cout <<"输入错误，请重新出入："<<endl;            cin>>arr[i];        }    }    fun(arr);    return 0;}void fun(int *arr){    int ave=0,i;    for(i=0;i<Size;i++)    {        ave+=arr[i];    }    ave/=Size;    cout<<"十个学生的平均分是："<<ave<<endl;}

#include <iostream>int divisor(int num_1,int num_2);int multiple(int num_1,int num_2);using namespace std;int main(){    int num_1,num_2,fac;    int C_divisor,C_multiple;    cout<<"请输入第一个整数: "<<endl;    cin>>num_1;    cout<<"请输入第二个整数数："<<endl;    cin>>num_2;    if(num_1<num_2)    {        fac=num_1;        num_1=num_2;        num_2=fac;    }    C_divisor=divisor(num_1,num_2);    C_multiple=multiple(num_1,num_2);    cout <<"两整数的最大公约数是: "<<C_divisor<<" ，最小公倍数是："<<C_multiple<<endl;}int divisor(int num_1,int num_2){    int C_d=0;    while(num_1%num_2!=0)    {        C_d=num_1%num_2;        num_1=num_2;        num_2=C_d;    }    return C_d;}int multiple(int num_1,int num_2){    int C_m;    if(num_1%num_2==0)        C_m=num_1;    else        C_m=(num_1*num_2)/divisor(num_1,num_2);    return C_m;}

#include <iostream>int count(int n);int fac(int n);using namespace std;int main(){    int n,add;    cout <<"请输入整数n： "<<endl;    cin >>n;    add=count(n);    cout <<"S=1!+2!+……n!= "<<add<<endl;    return 0;}int fac(int n){    int i,add=n;    for(i=n-1;i>0;i--)        add*=i;    return add;}int count(int n){    int i,add=0;    for(i=n;i>0;i--)    add+=fac(i);    return add;}

#include <iostream>void fun(int n);using namespace std;int main(){    int n;    cout << "请输入一个16进制的数： ";    cin >>hex>>n;    fun(n);    return 0;}void fun(int n){    cout <<"该数的十进制形式为："<<n<<endl;}

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