আমার নিচের প্রোগ্রামিং টি তে আপনারা আপনাদের প্রয়োজনীয় অনেক প্রোগ্রাম পাবেন।চাইলে সামনে আরো বড় প্রোগ্রাম দিব।
নিচের প্রগ্রাম টি নোটপ্যাড এ paste করে sr3.cpp নামে সেভ করুন।এবং এটি C ড্রাইভ এ TC এর মধ্যে bin এর মধ্যে রাখুন ।এবার ফাইল টি compile করে দেখুন।

#include<stdio.h>
#include<conio.h>
#include<ctype.h>
#include<math.h>
#include<dos.h>
#include<process.h>

void main()
{

clrscr();
textcolor(12);
clrscr();
int i,n,sum=0,a,count=0,j,k,b=1;
float R,T,r,l,w,pi=3.1416;
int choice;
char alphabet,c;
printf("<<<<<<<<<<<<<<<<<<<<<<<<<  INDEX  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>\n\n");
printf("1.(0~N) number and summation.\n2.Prime number\n3.Root,Square,Cube\n");
printf("4.ASCII value\n5.Factors\n6.Alphabet\n7.(+) or (-) number\n8.Upper case/Lower case\n9.Triangle,Circle,Rectangle ");
printf("\n10.Factorial number\n11.A hut design\n12.Vowels\n13.Sorting,travarsing & add item in the Array\n");
printf("14.Base & power\n");
printf("\n\n\tEnter your choice:\n");
scanf("\n%d",&i);
clrscr();
switch(i)
{
case 1:
printf(" what number you want  to go:\n");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
printf(" %d",i);
sum=sum+i;
}
printf("\n\tThe summation is %d",sum);
break;
case 2:
printf("Enter the number:");
scanf("%d",&a);
for(i=2;i<a;i++)
{
if(a%i==0)
count++;
}
if(count==0)
printf("The number is prime number.");
else
printf("The number is not  prime number.");
break;
case 3:
printf("____________________________________________________\n");
printf("Root        Square          Qube \n");
printf("____________________________________________________\n");
for(i=1;i<=10;i++)   {
j=i*i;
a=i*i*i;
printf("\n%2d%14d%14d",i,j,a);
}
break;
case 4:
for(c=33;c<=122;c=c+1)
printf(" %5d-%c",c,c);
break;
case 5:
printf("Enter the number:");
scanf("%d",&a);
for(i=1;i<=a;i++)
{
if(a%i==0)
printf(" %d",i);
}
break;
case 6:
printf("\n\n\nThe alphabet are:\n\n");
for(alphabet='A';alphabet<='Z';alphabet++)
printf(" %c",alphabet);
break;
case 7:
printf("\nEnter the number: ");
scanf("%d",&a);
if(a>=0){
printf("\nYou entered positive number.");}
else{
printf("\nYou entered negative number.");}
break;
case 8:
printf("Enter an alphabet: ");
scanf("%s",&c);

if(islower(c))
{
printf("\n\nUpper case:");
putchar(toupper(c));
}
else
{
printf("\n\nLower case:");
putchar(tolower(c));
}
break;
case 9:
printf("MENU:\n");
printf("\n**.Area of circle\n\n**.Rectangle\n\n**.Triangle");
printf("\n\nEnter your choice: ");
scanf("%d",&choice);
if(choice==1)
{
printf("\nEnter the radius: ");
scanf("%f",&r);
l=pi*r*r;
printf("\nThe area is: %.2f",l);
}
if(choice==2)
{
printf("\nEnter the Length: ");
scanf("%f",&l);
printf("\nEnter the weigth: ");
scanf("%f",&w);
R=l*w;
printf("\nRectangle: %.2f",R);
}
if (choice==3)
{
printf("\nEnter the base: ");
scanf("%d",&i);
printf("\nEnter the height: ");
scanf("%d",&j);
k=(i*j)/2;
printf("\nThe Triangle: %d",k);
}
break;
case 10:
printf("Enter number: ");
scanf("%d",&c);

for(a=c;a>0;a--)
{ b=b*a;
}
printf("\n%d! is \t%d",c,b);
break;
case 11 :
clrscr();
int d, t   ;
printf("press 1 for red,2 for green,3 for blue");
scanf("%d",&d);
switch(d) {

case 1:

textcolor(RED);
clrscr();
break;
case 2:
textcolor(GREEN);
clrscr();
break;
case 3:
textcolor(BLUE);
clrscr();
break;


}

for(j=1;j<=21;j=j+2)
{
printf("\t\t");
for(t=21;t>j;t--)
printf(" ");
for(i=0;i<j;i++)
printf(" *");
printf("\n");

}
for(i=1;i<19;i++)
{
for(t=2;t<4;t++)
printf("\t\t\t *");
printf("\n");
}
for(j=0;j<=72;j++)
printf("*");
printf("\n\n");
printf("\t\t\tThis is coded by SIMANTO ROMEL\n\t\t\tSoftware Engineer,Bangladesh\n");
for(i=1;i<5;i++)
{
for(t=2;t<4;t++)
printf("*\t\t\t\t\t\t\t\t\t");
printf("\n");

}
for(j=0;j<=72;j++)

printf("*");
printf("\n");

break;
case 12:
char vowel[5]={'A','E','I','O','U'};
printf("The vowels are:\n\n");
for(i=0;i<5;i++)    {
printf("%c\t",vowel[i]); }
break;
case 13:
int i,a[5],op,j,b;
printf("enter array element:\n\n");
for(i=1;i<=5;i++)
{
scanf("\t%d",&a[i]);
}
printf("\nThe given array is:");
for(i=1;i<=5;i++)
{
printf(" %d",a[i]);
}
printf("\n\n\t<<<<<<<<<<<<<<<<<<<<< MENU >>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
printf("\n\t1.add item\n\t2.delete an item\n\t3.sort element\n\t4.search\n\t5.traverse");
printf("\n\nEnter your option:");
scanf("%d",&op);
switch(op)
{
case 1:
printf("\n\n\tenter item to add in the array:");
scanf("%d",&j);
printf("\n\n\tFinal array is:");
for(i=1;i<=5;i++)
{
printf(" %d",a[i]);
}
printf(" %d",j);
break;
case 2:
printf("\n\n\tdelete an item:");
for(i=1;i<=4;i++)
printf(" %d",a[i]);
break;
case 3:
printf("\n\n\tAfter sorting:");
for(i=1;i<=4;i++)
{
for(j=1;j<=4;j++)
if(a[j]>=a[j+1])
{
t=a[j];
a[j]=a[j+1];
a[j+1]=t;
}
else
continue;
}

for(i=1;i<=5;i++)
printf(" %d",a[i]);
break;
case 4:
printf("\n\n\tsearch an item:");
scanf("%d",&b);
clrscr();
if(b==a[1] || b==a[2] || b==a[3] || b==a[4] || b==a[5])
printf("\t\t\titem found");
else
printf("\t\t\titem not found");
break;
case 5:
printf("\n\n\tThe traversing array is:");
for(i=5;i>=1;i--)
printf(" %d",a[i]);
}
break;
case 14:
int base,power ;
double result;
printf("Enter your base:\n") ;
scanf("%d",&base);
printf("Enter your power:\n");
scanf("%d",&power);
result=pow(base,power);
printf("\n\nThe result is %lf",result);
break;
}
getch();
}