INTERVIEW QUESTIONS PROGRAMMING LANGUAGES C DETAILS

Question: How to write a 'C' program to read an array of 10 numbers and print the prime nums?

this is what i wrote
could someone tell me where is my mistake?
can i use here flag at all?

#include <stdio.h>

void main ()
{
int arr[10], i, j, flag;

for (i=0;i<10;i++)

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

for (i=0;i<10;i++)
{
flag=1;


for (j=2;j<=(arr[i]/2); j++)
{
if (arr[i]%j==0)
{
flag=0;
break;

}
}
}

for (i=0;i<10;i++)
{
if (flag=1)

printf ("%d", arr[i]);
}

Answer: Hi, U r using the same flag for all the 10 numbers and after coming out of the two loops u r printing the numbers based on the value of the flag but the flag will contain the value thats been updated by the last number in the array..thats absolutely wrong..here is the correct program...

#include <stdio.h>

void main ()
{
int arr[10], i, j, flag;

for (i=0;i<10;i++)

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

for (i=0;i<10;i++)
{
flag=1;


for (j=2;j<=(arr[i]/2); j++)
{
if (arr[i]%j==0)
{
flag=0;
break;

}
}
if (flag==1)

printf ("%d", arr[i]);

}

Hi, U r using the same flag for all the 10 numbers and after coming out of the two loops u r printing the numbers based on the value of the flag but the flag will contain the value thats been updated by the last number in the array..thats absolutely wrong..here is the correct program...

#include <stdio.h>

void main ()
{
int arr[10], i, j, flag;

for (i=0;i<10;i++)

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

for (i=0;i<10;i++)
{
flag=1;


for (j=2;j<=(arr[i]/2); j++)
{
if (arr[i]%j==0)
{
flag=0;
break;

}
}
if (flag==1)

printf ("%d", arr[i]);

}

Source: CoolInterview.com

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