search for a particular number in given numbers

 void main()
     {
int a[10],n,i,k=0;
clrscr();
printf("enter the numbers");
for(i=0;i<10;i++)
{
scanf("%d",&a[i]);
}

printf("enter the number which you want to search");


scanf("%d",&n);

for(i=0;i<10;i++)
{
  if(a[i]==n)
  k++;
}

if(k==0)
printf("the entered number is not present ");
else
printf("the entered number is=%d occurs = %d times",n,k);
getch();
     }

program for producing following output

void main()

{

int i,j,k=65,g=1;

clrscr();

for(i=1;i<=8;i++)

{

for(j=7;j>=i;j--)

{

printf("%c",k++);

} for(g=2;g<=i;g++)

 {

 printf("  ");

 }

 for(j=7;j>=i;j--)

 {

 printf("%c",k--);

 }

 printf("\n");

}

getch();

}

How to add a user defined function to a library function:

Here we are going to create a function for factorial of a the given number:

Step 1:

First create the definition of the program and save it with name fact .c

 Int factorial(int num)
{
int  f=1,I;

For(i=1;i<=num;i++)

{  

            F=f*I;

}
return (f);
}

Step 2:

Compile “fact.c” file by using Alt + F9 keys (in turbo C).

step 3:

“fact.obj” file would be created which is the compiled form of “fact.c” file.

Step 4:

Then for adding your function to the library function type the code given below:

c:\> tlib math.lib + c:\ fact.obj
+ means adding c:\fact.obj file in the math library.
We can delete this file using – (minus){c:\> tlib math.lib - c:\ fact.obj}.

Step 5:        

Create a file “fact.h” & declare prototype of fact() function like below.
int factorial (int num);
Now fact.h file containing prototype of function “factorial”.

Step 6:

Let us see how to use our newly added library function in a C program.

# include <stdio.h>

// Including our user defined function.

# include “c:\\factorial.h”    

int main ()

{

       int f,n;

        prinntf(“enter any number”);   //message to the user

        scanf(“%d”,&n);                //receiving input from user

                                      // calling function from library

       f = factorial (n);

       printf ("factorial = %d \n", f);

        return 0;

}