c - No display of array -

the following implementation of spoj problem: http://www.spoj.com/problems/fctrl2/

#include <stdio.h> int main() {     int t;     scanf("%d",&t);     while(t--)     {         int carry=0,k,i,j,num,arr[1000]={1};         scanf("%d",&num);         for(i=1;i<=num;i++)         {             for(j=0;j<=k;j++)             {                 arr[j]=arr[j]*i+carry;                 carry=arr[j]/10;                 arr[j]=arr[j]%10;             }             while(carry)             {                 k++;                 arr[k]=carry%10;                 carry/=10;             }         }         for(i=k;i>=0;i--)//doubt         {             printf("%d",arr[i]);         }         printf("\n");     }      return 0; } 

i guess there mistake in displaying array in reverse direction, when change condition i.e for(i=0;i<=k;i++) prints array. please me solve problem.

int carry=0,k,i,j,num,arr[1000]={1};  for(j=0;j<=k;j++) 

k not initialized here, , have indeterminate value.

see https://stackoverflow.com/a/6212973/5708620

external , static variables initialized 0 default, guaranteed. automatic , register variables not have en explicit initializer have indeterminate value (either unspecified value or trap representation).