structure's variables value automatically changes in c

Question

I initialized q.size with 7 within main function, Then first it print q.size value as 7, but after the scanf() statement the value of q.size become 0. Why this is happening and how to solve it???

#include <stdio.h>
#include <stdlib.h>
struct sample
{
    int size;
    int rear;
    int front;
};

int main()
{
     struct sample q;
     q.size=7;
     char Ans;

     printf("%d\n",q.size);

     printf("Enter character : (y/n)");
     scanf("%s",&Ans);

    printf("%d",q.size);
    return 0;
}

Expected result from q.size after scanf() as 7 Actual result is 0

Which language?

Lightness Races in Orbit
– Lightness Races in Orbit

2019-07-16 10:50:22 +00:00
Commented Jul 16, 2019 at 10:50 — Lightness Races in Orbit
– Lightness Races in Orbit, Commented Jul 16, 2019 at 10:50

Denisof · Accepted Answer · 2019-07-16 10:46:22Z

7

You're reading a string %s into a char variable, this causes memory corruption. You have to put %c in scanf instead of %s in order to read a character.

answered Jul 16, 2019 at 10:46

Denisof

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