#include <stdio.h>
int tohex(int n)
{
int a;
if(n==0)
return;
else
{
tohex(n/16);
a=n%16;
if(a<10)
else if(a==10)
else if(a==11)
else if(a==12)
else if(a==13)
else if(a==14)
else
}
}
int main(void) {
int x;
tohex(x);
return 0;
}
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