CODEWITHSUNDEEP
csegmentation-fault
Patrick Wang
Patrick Wang

Reputation: 51

Segmentation fault:11, when I run C code

I am new in C programming. When I write a c code about sorting integers. I got a Segmentation fault: 11. I search the related articles, but seems too confusing for me. Here follows first part of my code(get 10 input integers, and derive all the odd integers). Can you help me?

#include <stdio.h>

int i;

int main(void)
{
int array[10];
int previous[10],odd[10];


printf("Pls enter 10 nums\n");
while(i < 10)
{
    scanf("%d", &array[i++]);
}

for(i = 0;i < 10;i++)
{
printf("%d ", array[i]);    
}

for(i = 0;i < 10;i++)
{
    int a,j;
    if(array[i] % 2 == 1)
    {
        previous[a] = i;
        odd[j] = array[i];
        a++;
        j++;
    }
}
}

Upvotes: 0

Views: 74

Answers (2)

Luis Alves
Luis Alves

Reputation: 1286

The problem is with the variables a and j. In C you cannot be sure that when you declare them they will have the value 0.

Upvotes: 4

phoebus
phoebus

Reputation: 14941

If you don't give i and a initial values you will likely be attempting to go beyond the bounds of your array.

Upvotes: 1

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