CODEWITHSUNDEEP
cscanfeof
gabi939
gabi939

Reputation: 107

how to correctly use a scanf and a EOF?

I am trying to fill my int array with numbers I get from the user.

but when I try to printf a specific index that is bigger then, it shows the wrong number.

for(B_index=0,checker=0; B_index<SIZE&&!checker; B_index++)
    {

        checker=scanf("%d",&B[B_index]);

        if(checker==EOF)
        {
            checker=1;
        }

        else if(checker<1)
        {
            printf("error");
            return 1;
        }

    }
    printf("%d",B[1]);

Upvotes: 0

Views: 156

Answers (1)

CrowdedMind
CrowdedMind

Reputation: 13

scanf returns the number of assignments back, so if you entered a valid integer on the console, scanf will return 1, which means it assigned an integer (due to %d) to B[0]. This causes checker to be 1 and will hence break the loop immediately after the first number has been entered. B[1] is unassigned and as such will contain garbage or 0 if you cleared out the array.

Upvotes: 1

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