Zealous Coders

Find Factorial of number using recursion in C

noreply@blogger.com (Zealous Engineerz) — Sun, 24 Feb 2013 07:16:00 +0000

#include<stdio.h>
int factorial(int n)
{
if(n == 0 || n == 1)
return 1;
else
return n*factorial(n-1);

int main(void)
{
int n;
printf("Enter Number to Find Factorial : ");
scanf("%d", &n);
printf("Factorial of %d is %d",n,factorial(n));
}

Sample Input and Output:-
Enter Number to Find Factorial : 5
Factorial of 5 is 120

This program works fine to find factorial upto 13. Although thts very small number. To find out factorial of some bigger numbers, keep updated. Will be uploaded soon.

How to see a code of a program without using a dedicated software

noreply@blogger.com (Zealous Engineerz) — Sun, 21 Oct 2012 19:58:00 +0000

From last two days, We got some queries about how to know the coding of a program as they dont have the software installed for the same right now..

The answer of the same question is very simple and clear.

Actually,
When we code for a problem statement in any language like C, C++, Embedded C, Assembly, java, php, html, a special file of dedicated extension is created.

like
for C -.c
for C++ - .cc or .cpp
for Java - .java
for html - .html
for Assembly - .asm
and much more...

These special files are known as compiled files...

in this the code for the program is present.
That code is known as source code.

Compiled files or source files can be opened in any editor, e.g. Notepad......

LCD Circuit

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 09:00:00 +0000

To distinguish whether the number is alphabet, number or special character

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:37:00 +0000

#include<stdio.h>
#include<conio.h>
int main(void)
{
unsigned char a;
printf("Enter Character : ");
a = getche();
if((a>64 && a<91) || (a>96 && a<123))
{
printf("Alphabet");
}
else if(a>47 && a<58)
{
printf("Number");
}
else
{
printf("Special Character");
}
return 0;
}

C++ - To distinguish whether the character is a alphabet or Number or special character.

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:36:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
unsigned char a;
cout<<"Enter Character : ";
a = getche();
if((a>64 && a<91) || (a>96 && a<123))
{
cout<<"Alphabet";
}
else if(a>47 && a<58)
{
cout<<"Number";
}
else
{
cout<<"Special Character";
}
return 0;
}

C++ - To Print first 100 natural numbers

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:31:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int i;
cout<<"First 100 natural numbers are : \t";
for(i=1; i<=100; i++)
{
cout<<i<<",\t";
}
getch();
return 0;
}

C++ - To print first 100 even numbers

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:28:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int i;
cout<<"First 100 natural even numbers are : \t";
for(i=1; i<200; i++)
{
if(i%2==0)
cout<<i<<"\t";
}
getch();
return 0;
}

C++ - To print 100 odd numbers

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:27:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int i;
clrscr();
cout<<"First 100 natural odd numbers are : \t";
for(i=1; i<200; i++)
{
if(i%2==1)
cout<<i<<"\t";
}
getch();
return 0;
}

C++ - Greatest number among two variables

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:25:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int x,y,z;
cout<<"\nEnter First Number : ";
cin>>x;
cout<<"\nEnter Second Number : ";
cin>>y;
if(x>y)
{
cout<<x<<" is greater than "<<y;
}
else if(y>x)
{
cout<<y<<" is greater than "<<x;
}
else
{
cout<<"Both Numbers are equal";
}
return 0;
}

Familiarization with various data types of C++

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:21:00 +0000

#include<iostream.h>
#include<stdio.h>
#include<conio.h>
int main(void)
{
cout<<"\nLower bound of char is "<<CHAR_MIN;
cout<<"\nUpper Bound of char is "<<CHAR_MAX;
cout<<"\nLower bound of int is "<<INT_MIN;
cout<<"\nUpper Bound of int is "<<INT_MAX;
cout<<"\nLower bound of long is "<<LONG_MIN;
cout<<"\nUpper Bound of long is "<<LONG_MAX;
cout<<"\nLower bound of unsigned char is "<<UCHAR_MIN;
cout<<"\nUpper Bound of unsigned char is "<<UCHAR_MAX;
cout<<"\nLower bound of unsigned int is "<<UINT_MIN;
cout<<"\nUpper Bound of unsigned int is "<<UNIT_MAX;
cout<<"\nLower bound of unsigned long is "<<ULONG_MIN;
cout<<"\nUpper Bound of unsigned long is "<<ULONG_MAX;
getch();
return 0;
}

C++ - Swap two numbers using three variables

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:18:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int x,y,z;
cout<<"\nEnter First Number : ";
cin>>x;
cout<<"\nEnter Second Number : ";
cin>>y;
z=x;
x=y;
y=z;
cout<<"\n\nAfter Swapping\n\nFirst Number : "<<x<<"\nSecond Number : "<<y;
return 0;
}

C++ - Swap number using two variable using bit-wise operators

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:16:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int x,y,z;
cout<<"\nEnter First Number : ";
cin>>x;
cout<<"\nEnter Second Number : ";
cin>>y;
x^=y;
y^=x;
x^=y;
cout<<"\n\nAfter Swapping\n\nFirst Number : "<<x<<"\nSecond Number : "<<y;
return 0;
}

C++ - Swap number using two variables using arithmetic oprator

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:14:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int x,y,z;
cout<<"\nEnter First Number : ";
cin>>x;
cout<<"\nEnter Second Number : ";
cin>>y;
x=x+y;
y=x-y;
x=x-y;
cout<<"\n\nAfter Swapping\n\nFirst Number : "<<x<<"\nSecond Number : "<<y;
return 0;
}

C++ - To multiply two numbers

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:11:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int x;
int y;
int res;
cout<<"Enter X : ";
cin>>x;
cout<<"Enter Y : ";
cin>>y;
res=x*y;
cout<<"X * Y = "<<res<<" where X = "<<x<<" and Y = "<<y;
getch();
return 0;
}

C++ - To add two numbers

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 07:10:00 +0000

#include<iostream.h>
#include<conio.h>
int main(void)
{
int x;
int y;
int res;
cout<<"Enter X : ";
cin>>x;
cout<<"Enter Y : ";
cin>>y;
res=x+y;
cout<<"X + Y = "<<res<<" where X = "<<x<<" and Y = "<<y;
getch();
return 0;
}

Double Seven Segment

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:46:00 +0000

Refer Double Seven Segment Circuit

#include<reg51.h>
#include<intrins.h>
void ms_delay(unsigned int a)
{
unsigned char b=255;
for(;a-->0;)
for(;b-->0;)
_nop_();
}

void main()
{
unsigned char x,y,j,i,a[10]= {0xc0, 0xf9, 0xa4, 0xb0, 0x99,
0x92, 0x82, 0xf8, 0x80, 0x90};

while(1)
{
for(i=0;i<99;i++)
{
x=i%10;
y=i/10;
for(j=0;j<60;j++)
{
t2=1;
t1=0;
P2=a[x];
ms_delay(10);
t2=0;
t1=1;
P2=a[y];
ms_delay(10);
}
}
}
}

Double Segment

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:42:00 +0000

Seven Segment

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:28:00 +0000

Basic 7-Seg

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:25:00 +0000

Refer Seven Segment Segment Circuit

#include<reg51.h>
#include<intrins.h>
void ms_delay(unsigned int a)
{
unsigned char b=255;
for(;a-->0;)
for(;b-->0;)
_nop_();
}

void main()
{
while(1)
{
unsigned char i,a[10] = {0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92,
0x82, 0xf8, 0x80, 0x90};

for(i=0;i<10;i++)
{
P1=a[i];
ms_delay(500);
}
}
}

LED X Pattern Special

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:17:00 +0000

Refer 'LED Basic Circuit' in 'Embedded Systems Circuits' Label

#include<reg51.h>
#include<intrins.h>
void ms_delay(unsigned int a)
{
unsigned char b=255;
for(;a-->0;)
for(;b-->0;)
_nop_();
}

void main()

{

unsigned char i,a,b,c;

while(1)

{

a=0x01;

b=0x80;

for(i=0;i<8;i++)

{

c=a^b;

c=~c;

P1=c;

a=a<<1;

b=b>>1;

ms_delay(500);

}

LED X patern

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:13:00 +0000

LED Sand Tough Pattern

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:10:00 +0000

Refer 'LED Basic Circuit' in 'Embedded Systems Circuits' Label

#include<reg51.h>
#include<intrins.h>
void ms_delay(unsigned int a)
{
unsigned char b=255;
for(;a-->0;)
for(;b-->0;)
_nop_();
}

void main()
{

unsigned char i,a,s,b,j,c;
while(1)
{
a=0xff;
b=0;
for(i=0;i<8;i++)
{
c=0xfe;
for(j=0;j<(8-b);j++)
{
P1=c&(a>>b);
c=c<<1;
c=c+0x01;
ms_delay(500);
}
b++;
}
if(P1==0X00)
{
a=0xff;
b=0;
for(i=0;i<8;i++)
{
c=0x01;
for(j=0;j<(8-b);j++)
{
s=c^(a>>b);
P1=~s;
c=c<<1;
ms_delay(500);
}
b++;
}
}
}
}

LED Sand Glass Pattern

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 06:03:00 +0000

Refer 'LED Basic Circuit' in 'Embedded Systems Circuits' Label

#include<reg51.h>
#include<intrins.h>
void ms_delay(unsigned int a)
{
unsigned char b=255;
for(;a-->0;)
for(;b-->0;)
_nop_();
}

void main()
{
unsigned char i,a,b,j,c;
while(1)
{
a=0xff;
b=0;
for(i=0;i<8;i++)
{
c=0xfe;
for(j=0;j<(8-b);j++)
{
P1=c&(a>>b);
c=c<<1;
c=c+0x01;
ms_delay(500);
}
b++;
}
}
}

LED Left Shift Increment

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 05:57:00 +0000

LED Right Shift Increment

noreply@blogger.com (Zealous Engineerz) — Mon, 01 Oct 2012 05:57:00 +0000