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Author: infotechprogrammer

Practise Programs/1sum.cpp

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+#include<iostream>
+using namespace std;
+int main()
+{ 
+    int a,b,sum; //variables
+    cout<<"Enter Number a =\t"; //\t for space
+    cin>>a;                                                
+    cout<<"Enter Number b =\t";
+    cin>>b;
+    sum = a+b; // + operator is used
+    cout<<"Sum = "<<sum;
+    return 0;
+
+}

Practise Programs/2sizeofoperator.cpp

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+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int i;
+    float f;
+    cout<<"Size of int = "<<sizeof(i);
+    cout<<"\nSize of int = "<<sizeof(int);
+    cout<<"\nSize of float = "<<sizeof(f);
+    cout<<"\nSize of float = "<<sizeof(float);
+    cout<<"\nSize of char = "<<sizeof(char);
+
+return 0;
+}

Practise Programs/3localandglobal.cpp

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+#include<iostream>
+using namespace std;
+int x=20;
+int main()
+{
+    int x=10;
+    cout<<"Local Variable = "<<x;
+    cout<<"\nGlobal Variable = "<<::x; // To access global variable
+return 0;
+}

Practise Programs/4manipulators.cpp

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+#include<iostream>
+#include<iomanip> //Required for these manipulators
+using namespace std;
+
+int main()
+{
+    int i;
+    cout<<"Enter a number = "; 
+    cin>>i; // or cin>>hex>>i; to get hexadecimal input only
+    cout<<"Hexadecimal value = "<<hex<<i<<endl; // 1.endl Manipulator:For next line
+    cout<<"Octal value = "<<oct<<i<<endl;  // 2.hex,dec,oct for converting base to hexadecimal(16),octal(8),decimal(10)
+    cout<<"Decimal value = "<<dec<<i<<endl;    
+    cout<<"Enter hexadecimal number = "; 
+    cin>>setbase(16)>>i; // 3.setbase(b) simailar to above toset base to hex, dec or oct
+    cout<<setw(27)<<"Hexadecimal value = "<<setbase(16)<<i<<endl; //4.setw() used to set the width of chacters in program
+    cout<<setw(27)<<"Octal value = "<<setbase(8)<<i<<endl;  
+    cout<<setw(27)<<"Decimal value = "<<setbase(10)<<i<<endl; 
+    int age=22,rollno=076;
+    cout<<setfill('#');
+    cout<<"Age"<<endl;
+    cout<<setw(4)<<age<<endl;
+    cout<<"Roll No"<<endl;
+    cout<<setw(4)<<rollno<<endl;
+
+    // float a=129.455396;
+    // cout<<"Float with 2 precision = "<<setprecision(2)<<a<<endl; //setprecision used to set precision of decimal numbers
+    // cout<<"Float with 4 precision = "<<setprecision(4)<<a<<endl;
+    // cout<<"Float with 6 precision = "<<setprecision(6)<<a<<endl;
+
+return 0;
+}
+

Practise Programs/5interchangevarsimple.cpp

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+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int a,b;
+    cout<<"Enter the values for a and b = "<<endl;
+    cin>>a>>b;
+    a=a+b;
+    b=a-b;
+    a=a-b;
+    cout<<"After interchanging "<<endl<<"a = "<<a<<" b = "<<b;
+
+return 0;
+}

Practise Programs/6terneryoperator.cpp

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+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int a,b,c;
+    cout<<"Enter three numbers a,b,c : "<<endl;
+    cin>>a>>b>>c;
+    int d=(a>b)?((a>c)?a:c) : ((b>c)?b:c);
+    cout<<"Greatest Number = "<<d;
+
+return 0;
+}

Practise Programs/7lowtouppercaseconditional.cpp

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+#include<iostream>
+using namespace std;
+
+int main()
+{
+    char c1;
+    cout<<"Enter a character = ";
+    cin>>c1;
+    char c2=(c1>='a'&& c1<='z')?('A'+c1-'a'):c1;
+    cout<<"Uppercase Equivalent = "<<c2;
+
+return 0;
+}

Practise Programs/8ifelseodeven.cpp

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+#include<iostream>
+using namespace std;
+
+int main()
+{
+    int num;
+    cout<<"Enter the number = ";
+    cin>>num;
+    if(num%2==0)
+    {
+        cout<<"Numbr is even"<<endl;
+    }else{
+        cout<<"Number is odd";
+    }
+    
+return 0;
+}

Practise Programs/9rootofquadraticeq.cpp

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+#include<iostream>
+#include<math.h>
+using namespace std;
+
+int main()
+{
+    float a,b,c,x1,x2;
+    cout<<"Enter values of a,b,c :";
+    cin>>a>>b>>c;
+    float d=(b*b)-(4*a*c);
+    if(d==0)
+    {
+        x1=x2=(-b)/(2*a);
+        cout<<"Roots are real and equal x1=x2= "<<x1;
+    }else if(d>0)
+    {
+        x1=((-b)+sqrt(d))/(2*a);
+        x2=((-b)-sqrt(d))/(2*a);
+        cout<<"Roots are x1= "<<x1<<"\tx2= "<<x2;
+    }else
+    {
+        cout<<"Roots are imaginary";
+    }
+
+return 0;
+}