LCM and HCM of two numbers

LCM and HCM of two numbers

/* C++ program to calculate LCM and HCM of two numbers */
#include< stdio.h>
#include< conio.h>
void main()
{
int a,b,c;
cout< < "Enter two nos : ;
cin>>a>>b;
c=a*b;
while(a!=b)
{
if(a>b)
a=a-b;
else
b=b-a;
}
cout< < "HCM \t= " < < a;
cout< < "LCM \t= " < < c/a;
getch();
}

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DIJKSRTRA'S ALGORITHM

DIJKSRTRA'S ALGORITHM

/*Implementation of Shortest Path Algorithm(DIJKSRTRA's ALGORITHM) in C*/

#include< stdio.h>

#include< conio.h>

#include< process.h>

#include< string.h>

#include< math.h>

#define IN 99

#define N 6

int dijkstra(int cost[][N], int source, int target);

void main()

{

int cost[N][N],i,j,w,ch,co;

int source, target,x,y;

clrscr();

printf("\tShortest Path Algorithm(DIJKSRTRA's ALGORITHM\n\n");

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

for(j=1;j< N;j++)

cost[i][j] = IN;

for(x=1;x< N;x++)

{

for(y=x+1;y< N;y++)

{

printf("Enter the weight of the path between node %d and %d: ",x,y);

scanf("%d",&w);

cost [x][y] = cost[y][x] = w;

}

printf("\n");

}

printf("\nEnter The Source:");

scanf("%d", &source);

printf("\nEnter The target");

scanf("%d", &target);

co = dijsktra(cost,source,target);

printf("\nShortest Path: %d",co);

getch();

}

int dijsktra(int cost[][N],int source,int target)

{

int dist[N],prev[N],selected[N]={0},i,m,min,start,d,j;

char path[N];

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

{

dist[i] = IN;

prev[i] = -1;

}

start = source;

selected[start]=1;

dist[start] = 0;

while(selected[target] ==0)

{

min = IN;

m = 0;

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

{

d = dist[start] +cost[start][i];

if(d< dist[i]&&selected[i]==0)

{

dist[i] = d;

prev[i] = start;

}

if(min>dist[i] && selected[i]==0)

{

min = dist[i];

m = i;

}

}

start = m;

selected[start] = 1;

}

start = target;

j = 0;

while(start != -1)

{

path[j++] = start+65;

start = prev[start];

}

path[j]='\0';

strrev(path);

printf("%s", path);

return dist[target];

}

/***** Output *********

Shortest Path Algorithm(DIJKSRTRA's ALGORITHM

Enter the weight of the path between node 1 and 2: 2

Enter the weight of the path between node 1 and 3: 3

Enter the weight of the path between node 1 and 4: 4

Enter the weight of the path between node 1 and 5: 5

Enter the weight of the path between node 2 and 3: 5

Enter the weight of the path between node 2 and 4: 2

Enter the weight of the path between node 2 and 5: 3

Enter the weight of the path between node 3 and 4: 1

Enter the weight of the path between node 3 and 5: 4

Enter the weight of the path between node 4 and 5: 5

Enter The Source:2

Enter The target4

CE

Shortest Path: 2

*/

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PC to PC Communication using RS-232

PC to PC Communication using RS-232

/*Aim: PC to PC Communication using RS-232 in 'C'. */

#include

#include

#define COM1 0

#define DATA_READY 0x100

#define SETTINGS ( 0x80 | 0x02 | 0x00 | 0x00)

int main(void)

{

int in, out, status;

bioscom(0, SETTINGS, COM1); /*initialize the port*/

cprintf("Data sent to you: ");

while (1)

{

status = bioscom(3, 0, COM1); /*wait until get a data*/

if (status & DATA_READY)

if ((out = bioscom(2, 0, COM1) & 0x7F) != 0) /*input a data*/

putch(out);

if (kbhit())

{

if ((in = getch()) == 27) /* ASCII of Esc*/

break;

bioscom(1, in, COM1); /*output a data*/

}

}

return 0;

}

/* OUTPUT:-

Data sent to you: HI...how are you??

*/

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ISO - OSI Model

ISO - OSI Model

/* Draw ISO - OSI Model using C */

#include< stdlib.h>
#include< graphics.h>
#include< conio.h>
#include< stdio.h>

void main()
{
int driver, mode;
int i,j;
driver = DETECT;
initgraph(&driver,&mode,"");

outtextxy(250,450,"ISO OSI Model");
delay(2000);
outtextxy(90,30,"Sender");
delay(500);
setcolor(6);
for(i=50;i< =350;i+=50)
{
rectangle(200,i,50,i+30);
delay(500);
}
setcolor(10);
outtextxy(70,60,"Application")

;
delay(500);
outtextxy(70,110,"Presentation");
delay(500);
outtextxy(70,160,"Session");
delay(500);
outtextxy(70,210,"Transport");
delay(500);
outtextxy(70,260,"Network");
delay(500);
outtextxy(70,310,"Data Link");
delay(500);
outtextxy(70,360,"Physical");
delay(500);
setcolor(15);
outtextxy(390,30,"Receiver");
delay(500);
setcolor(6);
for(i=50;i< =350;i+=50)
{
rectangle(350,i,500,i+30);
delay(500);
}
setcolor(10);
outtextxy(370,60,"Application");
delay(500);
outtextxy(370,110,"Presentation");
delay(500);
outtextxy(370,160,"Session");
delay(500);
outtextxy(370,210,"Transport");
delay(500);
outtextxy(370,260,"Network");
delay(500);
outtextxy(370,310,"Data Link");
delay(500);
outtextxy(370,360,"Physical");
delay(500);
// sender Lines
line(120,80,120,100);
delay(500);
line(120,130,120,150);
delay(500);
line(120,180,120,200);
delay(500);
line(120,230,120,250);
delay(500);
line(120,280,120,300);
delay(500);
line(120,330,120,350);
delay(500);
line(120,380,120,400);
delay(500);
// Physical Connection
line(120,400,420,400);
// Receiver Lines
line(420,380,420,400);
delay(500);
line(420,330,420,350);
delay(500);
line(420,280,420,300);
delay(500);
line(420,230,420,250);
delay(500);
line(420,180,420,200);
delay(500);
line(420,130,420,150);
delay(500);
line(420,80,420,100);
//virtual connection
setcolor(15);
delay(500);
outtextxy(210,35,"Virtual Connection");
delay(1000);
for(j=65;j< =365;j+=50)
{
for(i=0;i< 15;i++)
{
setcolor(i);
line(200,j,230,j);
delay(10);
line(235,j,265,j);
delay(10);
line(270,j,300,j);
delay(10);
line(305,j,335,j);
delay(10);
line(340,j,350,j);
delay(10);
}
}
delay(500);
}
/*

*/

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Two Dimentional array in C

Two Dimentional array in C

/* C program to input and display a 2-d array*/

#include< stdio.h>

#include< conio.h>

void main()

{

int num[3][3],i,j;

clrscr();

for(i=0;i< 3;i++)

{

for(j=0;j< 3;j++)

{

scanf("%d",&num[i][j]);

}

}

for(i=0;i< 3;i++)

{

for(j=0;j< 3;j++)

{

printf("\n%d",num[i][j]);

}

printf("\n");

}

getch();

}

Pointers example

Pointers example

/* Example of pointers in C. Thsi program uses a function to modify a string using pointers */

#include< stdio.h>

#include< conio.h>

void main()

{

void getstr(char *ptr_str,int *ptr_int);

int var=5;

char *pstr="lionel";

clrscr();

getstr(pstr,&var);

printf("The value of var after modification using pointer in a function is %d,var");

}

void getstr (char *ptr_str,int *ptr_int)

{

printf("%s\n",ptr_str);

*ptr_int=6;

getch();

}

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Call By Reference in C && Call by Values in C

Call By Reference program in C

/* Program for inerchanging two numbers demonstrating Call By Reference in C */

#include<>

#include<>

void swap(int *,int *);

void main()

{

int x,y;

x=15;y=20;

clrscr();

printf("x=%d,y=%d\n",x,y);

swap(&x,&y);

//printf("\n%x %x",&x,&y);

printf("\n after interchanging x=%d,y=%d\n",x,y);

getch();

}

void swap(int *u,int *v)

{

int temp;

temp=*u;

*u=*v;

*v=temp;

return;

}

Call by Values in C

/* Program on interchanging two numbers demonstrating Call By Values in C*/

#include< stdio.h>

#include< conio.h>

void main()

{

int x,y;

x=15;y=20;

clrscr();

printf("x=%d,y=%d\n",x,y);

swap(x,y);

printf("\n after interchanging x=%d,y=%d\n",x,y);

getch();

}

swap(int u,int v)

{

int temp;

temp=u;

u=v;

v=temp;

return;

}

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