If and If statement / using { }

I have a simple question . Why the first program don't work and return me 0 but the second where if go into another if works ? It wont go down and check the next if ?

      #include <stdio.h>
int main ()    
{
    int m,n,tmp,i;
    int nnumber=0,numbermin=9999999;
    scanf("%d %d",&m,&n);
    for(i=m;i<=n;i++)
    {
        tmp=i;
        while (tmp > 0 && (tmp % 10) % 2 == 0)
        {
        tmp/=10;  
        } 
        if (tmp == 0){ // This don't work i as want from this if to go down there and check the next if
    i only got 0 at the printf("%d" , numbermin);
            nnumber=i;  
        }
        if(nnumber<numbermin)
        {
            numbermin=nnumber;
        }

    }
    if(nnumber==0)
    printf("NO");
    else
    printf("%d",numbermin);
}

And the code that runs good .

#include <stdio.h>
int main ()    
{
    int m,n,tmp,i;
    int nnumber=0,numbermin=9999999;
    scanf("%d %d",&m,&n);
    for(i=m;i<=n;i++)
    {
        tmp=i;
        while (tmp > 0 && (tmp % 10) % 2 == 0)
        {
        tmp/=10;  
        } 
        if (tmp == 0){
            nnumber=i;
        if(nnumber<numbermin)
        {
            numbermin=nnumber;// But this work perfect i want to know why the first ex didn't work ?
        }
        }


    }
    if(nnumber==0)
    printf("NO");
    else
    printf("%d",numbermin);
} 

Why only the second one work good but the first don't ?