计算机程序设计基础.doc

计算机程序设计基础 ——精讲多练C/C++语言 程序的基本结构 1、在屏幕上显示如下图形： **************** * Hello World * **************** #include <iostream> using namespace std; int main() { cout<<"****************"<<endl; cout<<"* Hello World *"<<endl; cout<<"****************"<<endl; return 0; } 编写一个通用计算器程序，当用户输入两个数后，可以计算并输出这两个数的和、差、 积、商。 #include <iostream> using namespace std; int main() { double x,y,sum,sub,mult,div; cout<<"Please enter the two Numbers for calculation:"; cin>>x>>y; sum=x+y; sub=x-y; mult=x*y; div=x/y; cout<<x<<"+"<<y<<"="<<sum<<endl; cout<<x<<"-"<<y<<"="<<sub<<endl; cout<<x<<"*"<<y<<"="<<mult<<endl; cout<<x<<"/"<<y<<"="<<div<<endl; return 0; } 编写一个计算直角三角形斜边边长的程序，要求当输入直角三角形的两个直角边边长后 ，能够计算出第三边（即斜边）的边长。 #include<iostream> #include<cmath> using namespace std; int main(){ double a,b,c; cout<<"Please enter two right edge of the right triangle:"; cin>>a>>b; c=sqrt(a*a+b*b); cout<<"Calculation results:hypotenuse c="<<c<<endl; return 0; } 编写程序，计算在X=3时的值。 #include <iostream> #include<cmath> using namespace std; int main() { double x,y; cout<<"Please enter the one Number for calculation:"; cin>>x; y=sqrt(x)-6*(x+1/x)+((x-3.2)*(x-3.2))/((x+7.7)*(x+7.7)*(x+7.7)); cout<<"Calculation results: y="<<y<<endl; return 0; } 编写一个程序，当输入某学生"英语"课程的平时成绩、期中考试和期末考试成绩及各项 占总成绩百分比后，可以计算出该生的"英语"课程的最终成绩。 #include<iostream> using namespace std; int main(){ double peacetime,midterm, terminal,total,rate1,rate2,rate3; char p1,p2,p3; cout<<"Please input peacetime result:"<<endl; cin>>peacetime; cout<<"Please input peacetime result accounts for the percentage of total grade:"<<endl; cin>>rate1>>p1; cout<<"Please input the mid-term examination results:"<<endl; cin>>midterm; cout<<"Please input midterm examination result accounts for the percentage of total grade:"<<endl; cin>>rate2>>p2; cout<<"Please input peacetime result:"<<endl; cin>>terminal; cout<<"Please input midterm examination result accounts for the percentage of total grade:"<<endl; cin>>rate3>>p3; total=(peacetime*rate1+midterm*rate2+terminal*rate3)/100; cout<<"T