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Author: madhurimarawat

Abstract class/Abstract-class-output.exe

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+#include<iostream>
+using namespace std;
+class polygon{
+public:
+virtual void sides()=0;
+void print(){
+cout<<"Abstract base class\n";
+} };
+class triangle:public polygon{
+public:
+void sides(){
+cout<<"Triangle has 3 sides.\n";
+cout<<"Implementing in derived class.\n";} };
+class square:public polygon{
+public:
+void sides(){
+cout<<"Square has 4 sides.\n";
+cout<<"Implementing in derived class.\n";} };
+int main(){
+triangle t;
+t.sides();
+t.print();
+square s;
+s.sides();
+return 0;
+ }
+/*polygon p;
+ Abstract-class.cpp:20:9: error: cannot declare variable 'p' to be of abstract type 'polygon'
+ polygon p;
+         ^
+Abstract-class.cpp:3:7: note:   because the following virtual functions are pure within 'polygon':
+ class polygon{
+       ^~~~~~~
+Abstract-class.cpp:5:14: note:  virtual void polygon::sides()
+ virtual void sides()=0;
+              ^~~~~*/
+/*Triangle has 3 sides.
+Implementing in derived class.
+Square has 4 sides.
+Implementing in derived class.*/

Abstract class/Abstract-class.cpp

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+#include<iostream> 
+using namespace std;   
+int main(){ 
+//WAP in C++ to find largest number of array  
+int n,a[15],l=0;  
+cout<<"Enter the number of element:";    
+cin>>n;    
+for(int i=0;i<n;i++){
+cout<<"Enter element "<<i+1<<":";  cin>>a[i];  }
+for(int i=0;i<n;i++){    
+if(a[0]<a[i]){
+a[0]=a[i];
+} }
+l=a[0];
+ cout<<"Largest number of the array is:"<<l<<endl;    
+return 0;   }

Array/Largest-element-array-code.cpp

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+#include<iostream> 
+using namespace std;   
+int main(){ 
+//WAP in C++ to multiply matrix  
+int a[10][10],b[10][10],mul[10][10],r,c,i,j,k,p=1,q=1;    
+cout<<"Enter the number of row:"<<endl;    
+cin>>r;    
+cout<<"Enter the number of column:"<<endl;    
+cin>>c;    
+cout<<"Enter the first matrix element"<<endl;    
+for(i=0;i<r;i++){    
+for(j=0;j<c;j++){  
+cout<<"Element"<<p<<":"<<endl;   
+cin>>a[i][j];    p++;   }    }    
+cout<<"Enter the second matrix element"<<endl;  
+for(i=0;i<r;i++)    {      
+for(j=0;j<c;j++){  
+cout<<"Element"<<q<<":"<<endl;   
+cin>>b[i][j];    q++;  }    
+}
+ cout<<"Multiplication of the matrix:"<<endl;    
+for(i=0;i<r;i++){    
+for(j=0;j<c;j++) {    
+mul[i][j]=0;    
+for(k=0;k<c;k++) {    
+mul[i][j]+=a[i][k]*b[k][j];    
+}    }    }    
+for(i=0;i<r;i++){    
+for(j=0;j<c;j++){    
+cout<<mul[i][j]<<"\t";    }    
+cout<<"\n";    }    
+return 0;  }

Array/Largest-element-array-output.exe

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+#include<iostream>
+using namespace std;
+//program to implement array of object
+class emp{
+private:
+int id;
+public:
+string name;
+float salary;
+void getdata(int i,string n,float s){
+id=i;
+name=n;
+salary=s;}
+void putdata(){
+cout<<"Employee details are:"<<endl;
+cout<<"Id is:"<<id<<""<<endl;
+cout<<"Name is:"<<name<<""<<endl;
+cout<<"Salary is:"<<salary<<""<<endl;}};
+int main(){
+emp e1[23];
+int n;
+cout<<"Enter number of employees data to be stored:";
+cin>>n;
+int id,i;
+char name[100]; float sa;
+for(i=0;i<n;i++){
+ cout<<"Enter id,name and salary:\n";
+cin>>id>>name>>sa;
+e1[i].getdata(id,name,sa);
+e1[i].putdata(); }
+return 0;
+}

Array/Matrix-multiplication-code.cpp

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+#include<iostream>
+using namespace std;
+class book{
+private:
+int id;
+public:
+string name;
+string writer;
+string subject;
+string course;
+void insert(int i,string n,string w,string s,string c){
+id=i;
+name=n;
+writer=w;
+subject=s;
+course=c;
+}
+void display(){
+cout<<"Book details are:"<<endl;
+cout<<"Id is:"<<id<<""<<endl;
+cout<<"Name is:"<<name<<""<<endl;
+cout<<"writer is:"<<writer<<""<<endl;
+
+cout<<"subject is:"<<subject<<""<<endl;
+cout<<"course is:"<<course<<""<<endl;
+
+}
+};
+int main(){
+book b1;
+book b2;
+int id;
+char name[100],writer[100],subject[100],course[100];
+ cout<<"Enter id,name,writer,subject,course:\n";
+cin>>id>>name>>writer>>subject>>course;
+b1.insert(id,name,writer,subject,course);
+b1.display();
+cout<<"Enter id,name,writer,subject,course:\n";
+cin>>id>>name>>writer>>subject>>course;
+b2.insert(id,name,writer,subject,course);
+b2.display();
+return 0;
+}