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18 changes: 10 additions & 8 deletions chap05/26/main.c
Original file line number Diff line number Diff line change
@@ -1,12 +1,14 @@
#include <stdio.h>
void ruler(int a, int b, int h);
void mark(int h);
//r represent ruler
void r(int a, int b, int h);
//m represent mark
void m(int h);

int main(void)
{
ruler(0, 11, 4);
mark(30);
ruler(4, 20, 4);
r(0, 11, 4);
m(30);
r(4, 20, 4);
return 0;
}

Expand All @@ -19,10 +21,10 @@ void ruler(int a, int b, int h)
}

mid = a + ((b - a) >> 1);
ruler(a, mid, h - 1);
r(a, mid, h - 1);
printf("%2d|", mid);
mark(h);
ruler(mid + 1, b, h - 1);
m(h);
r(mid + 1, b, h - 1);
}

void mark(int h)
Expand Down