Print Next Even Digit

C CODE:

#include<stdio.h>
#include <stdlib.h>

int main()
{
char a[1000],d;
scanf("%s",a);
int i,j,k,l;
l=strlen(a);
for(i=0;i<l;i++)
{
    if(a[i]%2==0&&a[i]!='8')
    {
      d=a[i];
      printf("%c",d+2);
    }else if(a[i]%2!=0&&a[i]!='9')
    {
        d=a[i];
        printf("%c",d+1);
    }else
    {
        printf("0");
    }
}

}

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