章5

来源：互联网发布：统计软件spss 编辑：程序博客网时间：2024/05/04 21:05

#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;int n=ncomp(k,++k);  //从右到左顺序，先求++k，此后k=3cout<<n<<endl;return 0;}

#include<iostream>using namespace std;void swap(int u,int v){int temp;  //此处temp为中介值而非终值无需返回temp=u;u=v;v=temp;}int main()   //值调用发不能实现互换，因为值调用法被调用函数形参不能影响主函数实参的值！！{int a=3,b=4;cout<<a<<"\t\t"<<b<<endl;cout<<a<<"\t\t";swap(a,b);cout<<b<<endl;return 0;}

#include<iostream>using namespace std;void swap(int &u,int &v)  //引用调用{int temp;  //此处temp为中介值而非终值无需返回temp=u;u=v;v=temp;}int main()   {int a=3,b=4;cout<<a<<"\t\t"<<b<<endl;swap(a,b);cout<<a<<"\t\t"<<b<<endl;return 0;}

#include<iostream>using namespace std;long f2(int);long f1(int p){int k;long r;k=p*p;r=f2(k);return r;}long f2(int q){long fact=1;for(int i=1;i<=q;i++)fact*=i;return fact;}int main(){int i;long sum=0;for(i=2;i<4;i++)sum+=f1(i);cout<<sum<<endl;return 0;}

#include<iostream>#include<iomanip>using namespace std;float f(float x);float root(float x1,float x2);float point(float x1,float x2);int main(){float x1,x2,y1,y2,x;d0{cout<<"请输入根所在范围：";cin>>x1>>x2;y1=f(x1);y2=f(x2);cout<<"两端点的值为：["<<y1<<","<<y2<<"']"<<endl;}while(y1*y2>=0);x=root(x1,x2);cou<<"x="<<x<<endl;return 0;}float f(float x){return(x*x*x-4*x*x+6*x-10);}float root(float x1,x2);{float y,x,y1;y1=f(x1);do{x=point(x1,x2);y=f(x);if(y*y1>0){y1=y;x1=x;}else x2=x;}while (fabs(y)>=0.0001);retyrn x;}float point(float x1,float x2){float y;y=(x1*f(x2)-x2*f(x1)/(f(x2)-f(x1));retirn y;}return 0;}

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