Formatted the code

Formatted the code for better readability

Author: madhurimarawat

5 Basic Programs/Area-of-triangle-and-rectangle-code.cpp

@@ -0,0 +1,26 @@
+#include <iostream>
+using namespace std;
+int tarea(int b, int h)
+{
+  return 0.5 * b *h;
+}
+int rarea(int l, int b)
+{
+  return l *b;
+}
+int main()
+{
+  int ba, h;
+  cout << "Enter Base of triangle:\n";
+  cin >> ba;
+  cout << "Enter Height of triangle:\n";
+  cin >> h;
+  cout << "Area of triangle is:" << tarea(ba, h) << endl;
+  int a, b;
+  cout << "Enter Length of rectangle:\n";
+  cin >> a;
+  cout << "Enter Breadth of rectangle:\n";
+  cin >> b;
+  cout << "Area of rectangle is:" << rarea(a, b) << endl;
+  return 0;
+}

5 Basic Programs/electricity-bill-code.cpp

@@ -0,0 +1,22 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+  int u, p;
+  cout << "Enter numbers of units:\n";
+  cin >> u;
+  if ((u > 0) && (u <= 100))
+  {
+    p = u * 4;
+  }
+  else if ((u > 100) && (u <= 300))
+  {
+    p = u * 5;
+  }
+  else
+  {
+    p = u * 7;
+  }
+  cout << "Price is :" << p << "";
+  return 0;
+}

5 Basic Programs/first-program-print-two-numbers-code.cpp

@@ -0,0 +1,10 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+  int a, b;
+  cout << "Enter two numbers:\n";
+  cin >> a >> b;
+  cout << "Entered numbers are:" << a << "\n" << "" << b;
+  return 0;
+}

5 Basic Programs/firstmanipulation-without-namespace-code.cpp

@@ -0,0 +1,9 @@
+#include <iostream>
+int main()
+{
+  int a, b;
+  std::cout << "Enter two numbers:\n";
+  std::cin >> a >> b;
+  std::cout << "Entered numbers are:" << a << " \n" << b;
+  return 0;
+}

5 Basic Programs/largest-3-code.cpp

@@ -0,0 +1,36 @@
+#include <iostream>
+using namespace std;
+void large(int a, int b, int c)
+{
+  if (a > b)
+  {
+    if (a > c)
+    {
+      cout << "The largest number is:" << a;
+    }
+    else
+    {
+      cout << "The largest number is:" << c;
+    }
+  }
+  else if (b > c)
+  {
+    cout << "The largest number is:" << b;
+  }
+  else
+  {
+    cout << "The largest number is:" << c;
+  }
+}
+int main()
+{
+  int n1, n2, n3;
+  cout << "Enter number 1:" << endl;
+  cin >> n1;
+  cout << "Enter number 2:" << endl;
+  cin >> n2;
+  cout << "Enter number 3:" << endl;
+  cin >> n3;
+  large(n1, n2, n3);
+  return 0;
+}

5 Basic Programs/prime-number-code.cpp

@@ -0,0 +1,25 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+//WAP in C++ to find print prime numbers upto 20
+  int i;
+  cout << "Prime numbers are:\n2" << endl;
+  for (int i = 2; i <= 20; i++)
+  {
+    for (int j = 2; j < i; j++)
+    {
+      if (i % j == 0)
+      {
+        break;
+      }
+      else
+      {
+        if (i == j + 1)
+          cout << i << endl;
+      }
+    }
+  }
+
+  return 0;
+}

5 Basic Programs/sum-using-functions-code.cpp

@@ -0,0 +1,13 @@
+#include <iostream>
+using namespace std;
+int main()
+{
+  int a, b, sum, mul;
+  cout << "Enter two numbers:\n";
+  cin >> a >> b;
+  sum = a + b;
+  mul = a *b;
+  cout << "Sum of number " << a << " and " << b << " is  " << sum << endl;
+  cout << "Multiplication of number  " << a << " and " << b << " is  " << mul << endl;
+  return 0;
+}

Abstract class/Abstract-class.cpp

@@ -1,29 +1,41 @@
-#include<iostream>
+#include <iostream>
 using namespace std;
-class polygon{
+class polygon
+{
 public:
-virtual void sides()=0;
-void print(){
-cout<<"Abstract base class\n";
-} };
-class triangle:public polygon{
+  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{
+  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;
- }
+  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;

Array/Largest-element-array-code.cpp

@@ -1,16 +1,24 @@
-#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;   }
+#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/Matrix-multiplication-code.cpp

@@ -1,32 +1,52 @@
-#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;  }
+#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;
+}