22) Write a ‘C’ program to read n integers and create two lists such that all positive numbers are in one list and negative numbers are in another list. Display both the lists.

#include<stdio.h>
int main()
{
double number;
printf("Enter a number: ");
scanf("%lf", &number);
if (number <= 0.0)
{
if (number == 0.0)
printf("You entered 0.");
else
printf("You entered a negative number.");
}
else
printf("You entered a positive number.");
return 0;
}
Enter a number: 12.3
You entered a positive number.

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Notice: Constant DB_HOST already defined in /home/itprojectsco/public_html/includes/database.php on line 10

Notice: Constant DB_USER already defined in /home/itprojectsco/public_html/includes/database.php on line 10

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22) Write a ‘C’ program to read an adjacency matrix of a directed graph and traverse using BFS.

#include<stdio.h>
#define MAX 20
typedef struct queue
{
int q[MAX],front,rear;
}QUEUE;
void init_queue(QUEUE *qp)
{
qp->front = qp->rear = -1;
}
void add(QUEUE *qp, int val)
{
qp->q[++qp->rear]=val;
}
int delete(QUEUE *qp)
{
return qp->q[++qp->front];
}
int is_empty(QUEUE *qp)
{
return qp->front==qp->rear;
}
void accept_graph(int G[][MAX], int noe)
{
int i,u,v;
for(i=0;i<noe;i++)
{
printf("Enter start and end vertex:");
scanf("%d %d",&u,&v);
G[u][v] = 1;
}
}
void bfs(int G[][MAX], int n, int s)
{
int visited[MAX]={0},u,v;
QUEUE q;
init_queue(&q);
add(&q, s);
visited[s]=1;
while(!is_empty(&q))
{
u = delete(&q);
printf("V%d ",u);
for(v=0;v<n;v++)
{
if(G[u][v]==1 && !visited[v])
{
visited[v]=1;
add(&q, v);
}
}
}
}
void main()
{
int G[MAX][MAX]={0},n,noe,s;
clrscr();
printf("Enter no.of vertices:");
scanf("%d",&n);
printf("Enter no.of edges:");
scanf("%d",&noe);
accept_graph(G,noe);
printf("Enter source vertex:");
scanf("%d",&s);
printf("BFS:");
bfs(G,n,s);
getch();
}
Output-
Enter no.of vertices: 3
Enter no.of edges:2
Enter start and end vertex: 2 4
Enter start and end vertex:3 6
Enter source vertex:5
BFS:V5

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