12. 若运行以下程序时,从键盘输入3.6,2.4<CR>,(<CR>表示回车),则下面程序的运行结果是( )
#include <math.h>
# include <stdio.h>
main()
{float x,y,z;
scanf("%f,%f",&x,&y);
z=x/y;
while(1)
{if(fabs(z)>1.0) {x=y;y=z;z=x/y;}
else break;}
printf("%f\n",y);}
A. 1.5
B. 1.6
C. 2.0
D. 2.4
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