Answer Posted / raveathul farzaana.m.y

#include<stdio.h>
#include<conio.h>
void main()
{
int p[50][50],rows,columns;
clrscr();
for(rows=1;rows<=50;rows++)
{
for(columns=1;columns<=50;columns++)
{
printf("\nEnter the value of row%d column%d:",rows,columns);
scanf("%d",&p[rows][columns]);
}}
for(rows=1;rows<=50;rows++)
{
for(columns=1;columns<=50;columns++)
{
if(p[rows][columns]==1)
printf(".");
else
printf(" ");
}
printf("\n");
}
getch();
}

I have got one problem .I initially have got windows vista in my computer but now I installed linux UBUNTU operating system into my computer .For this i first format D: drive and got installed finely there and restart , when it boots there there were two options vista and ubuntu .But the problem is that when i choose vista it opens but screen seems to be dark only mouse pointer sees in the screen and no more windows appeared . But when i choose ubuntu it opens and asks for username and password .But i don't know these things. But linux is freeopen software , why it asks userename and password ? Now i am unable to use my computer ,i installed lunux without partioning the drive. Plz give me the solution The computer configuration of my computer is 80 GB harddisk, 1 GB RAM.3GHz speed.

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