C++ Class program ,which calculates area and circumference of circle.

#include<iostream>

using namespace std;
class circle
{int radius;
public:
void setradius()
{cout<<"enter radius=";
cin>>radius;
}
int getdia()
{int d;
cout<<"diameter="<<2*radius<<endl;
}
double getarea()
{double x;
x=3.14*radius*radius;
cout<<"area="<<x<<endl;
}
double getcir()

{double cir;
cir=2*3.14*radius;
cout<<"circumference="<<cir;
}

};
int main()
{circle c;
c.setradius();
cout<<endl;
c.getdia();
cout<<endl;
c.getarea();
cout<<endl;
c.getcir();
return 0;
}

C++ ENTERING NAMES OF STUDENTS

#include<iostream>
#include<string>
using namespace std;
int main()
{ string s[5];
int i;
cout<<"enter the names"<<endl;
for(i=0;i<5;i++)
{

cin>>s[i];
}
cout<<"names are="<<endl;
for(i=0;i<5;i++)
{cout<<s[i]<<endl;
}
return 0;
}

C++ ADDITION

#include<iostream>
#include<conio.h>
using namespace std;
int main()
{
int a,b,c;
cout<<"enter first number:";
cin>>a;
cout<<"enter second number:";
cin>>b;
c=a+b;
cout<<"the sum of two number:-"<<c<<endl;
return 0;
}

C PROGRAMMING --- SHIFT OPERATOR

#include<conio.h>
#include<stdio.h>
void main()
{       clrscr();
int a,b,c,ch;
printf("enter any integer\n\n");
scanf("%d",&a);
printf("\n\nenter the no of places to shift=");
scanf("%d",&c);
printf("\n\nenter 1 for left shift\tenter 2 for right shift=");
scanf("%d",&ch);
switch(ch)
{ case 1: { b=a<<c;
printf("\n\nshift left << of integer=%d.\n",b);
break;
}
case 2: { b=a>>c;
printf("\n\nshift right >> of integer=%d.\n",b);
break;
}
default : { printf("error\n");
 }
}
getch();
}

C PROGRAMMING--- STRING FUNCTIONS

#include<conio.h>
#include<stdio.h>
#include<string.h>
void main()
{    clrscr();
    char a[10];
    printf("enter string\n");
    gets(a);
    puts(strupr(a));
    puts(strlwr(a));
    getch();
}




#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
    clrscr();
    char  a[10];
    printf("enter the string\n");
    gets(a);
    puts(strrev(a));
    getch();
}



#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
    clrscr();
    char b[10];
    char  a[10];
    int i;
    printf("enter the string 1.\n");
    gets(a);
    printf("enter the string 2.\n");
    gets(b);
    if(strcmp(a,b)==0)
    {
        printf("equal!!");
    }
    getch();
}



#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
    clrscr();
    char b[10];
    char  a[10];
    int i;
    printf("enter the string\n");
    gets(a);
    for(i=0;a[i]!='\0';i++)
    {     b[i]=a[i];
    }
    b[i]='\0';
    printf("copied string=");
    puts(b);
    getch();
}


#include<stdio.h>
#include<conio.h>
#include<string.h>
void main()
{
    clrscr();
    char b[10];
    char  a[10];
    int i;
    printf("enter the string\n");
    gets(a);
    strcpy(b,a);
    printf("copied string=");
    puts(b);
    getch();
}

C PROGRAMMING ---- ENUMERATIONS

#include <stdio.h>
#include <conio.h>
#include <stdio.h>
enum week{ sunday, monday, tuesday, wednesday, thursday, friday, saturday};
void main()
{
    clrscr();
    printf("%d day",wednesday);
    getch();
   }

C PROGRAMMING ----SUM OF TWO DISTANCE USING STRUCTURE

#include<stdio.h>
#include<conio.h>
struct distance
{    int ft1,ft2,
    sum1,sum2,
    inch1,inch2;
}d;
void main()
{       clrscr();
    d.sum1=0;d.sum2=0;
    printf("enter the distances\n1.\t 2.\n");
    scanf("%d%d\t%d%d",&d.ft1,&d.inch1,&d.ft2,&d.inch2);
    d.sum1=d.ft1+d.ft2;
    d.sum2=d.inch1+d.inch2;
    if(d.sum2>11)
    {      d.sum1++;
           d.sum2=d.sum2-12;
    }

    printf("total distance=%d.%d",d.sum1,d.sum2);
    getch();
}