Experiment 1 simple program design

• Experimental purpose or task

Object oriented software development method is a software development method developed by absorbing useful concepts and effective methods in the field of software engineering . It sets abstraction 、 encapsulation 、 Inheritance and polymorphism in one , It can help programmers develop modularity 、 High degree of data abstraction , Reflect information concealment 、 Reusable 、 Easy to modify 、 Easy to transplant and other features of the program . 

This course is based on C++ The object-oriented mechanism in the language is mainly , Discuss the basic idea and method mechanism of object-oriented programming . Through the experimental teaching link , Enable learners to pass a certain amount of program examples and related exercises in the learning process , Gradually master C++ Process oriented and object-oriented functions , So as to master the basic knowledge and skills of object-oriented programming .

Through this experimental teaching link , It can improve learners' professional ability in the following aspects ：

1. Improve learners' abstract ability and logical thinking ability to solve problems ;
2. Preliminarily master the object-oriented software design ideas ;
3. Improve learners' self-learning ability of object-oriented program development tools ;
4. Make learners have the basic literacy of object-oriented program development .

• Basic requirements of experimental teaching

1. Understand and master C++ Advanced features of language functions , Understand the data abstraction and data encapsulation of object-oriented programming , master C++ The mechanism and method of data encapsulation and information hiding through classes and objects ;
2. Understand the design idea of object-oriented programming code reuse , master C++ Class inheritance and derivation mechanism and implementation approach ;
3. Understand the concept and idea of polymorphism in object-oriented programming , master C++ Operation overload 、 function overloading 、 The mechanism and method of realizing polymorphism by virtual function Technology ;
4. Understand and master C++ I/O The idea and method of device independence of stream to realize input and output

Summary

1. Design the program to find 1-100 Prime number between , Show it .

2. Two dimensional array ：M A classmate N Course grade processing , The character array stores names .

The basic requirements

use for or while or do-while Loop statement implementation , A program that can sort data , Be able to use two-dimensional array and skillfully input students' grades , lookup , Sort , Output and submit the program .

#include<iostream>
#include<cmath>

using namespace std;

int  main(){
    int cinLine=0;
	for(int i=2;i<=100;i++){
		int sqrtNumber = (int)sqrt(i);
		int count=0;
		for(int j=2;j<=sqrtNumber;j++){
			if(i%j==0){
				count++;
                break;
			}
		}
		if(count==0){
			cout<<" "<<i;
			cinLine++;
		}
	}
	return 0;
}

#include <iostream>
#include <cmath>
#include <cstring>
#define M 5// Define the quantity of Mathematics 
#define N 5// Define the number of courses 
using namespace std;

struct student{
	string name[M];
	double studentcore[M][N];
};

class Student {
	public:
		void insert(){
			for(int i=0;i<M;i++){
				cout<<" Enter the name of the student : ";
				cin>>studentName[i];
				cout<<" Enter the students "<<studentName[i]<<" The achievement of ：";
				for(int j=0;j<N;j++)
					cin>>studentCore[i][j];
			}
		}
		void showCore(){
			for(int i=0;i<M;i++){
				cout<<studentName[i]<<" ";
				for(int j=0;j<N;j++)
					printf("%5.1f",studentCore[i][j]);
				cout<<endl;
			}
		}
		void serach(){
			string name;// Name of student to be searched 
			bool flag=false;
			cout<<" Enter the name of the student you want to find ：";
			cin>>name;
			for(int i=0;i<M;i++){
				flag=false;
				if(name==studentName[i]){
					flag=true;
					if(flag){
						for(int j=0;j<N;j++)
							printf("%5.1f",studentCore[i][j]);
					}
				}
			}
		}
	private:
		string studentName[M];// Student's name collection 
		double studentCore[M][N];// Two dimensional student achievement 
};

int main() {
	Student student;
	student.insert();// Initialize students and grades 
	student.showCore();// Show students and grades 
	student.serach();// Find grades by name 
	return 0;
}