怎麽用c語言編程壹個分段函數

#include?"math.h"

int?main(int?argc,char?*argv[]){

double?x,y;

printf("Input?x(R:)...\nx=");

scanf("%lf",&x);

if(x<5)

y=-x+3.5;

else?if(x>=5?&&?x<10)

y=20-3.5*pow(x+3,7);//這裏看著像7,是幾就把7改成幾

else

y=-3.5+sin(x);

printf("y?=?%g\t(x==%g)\n",y,x);

return?0;

}

運行樣例：