有以下程序int fun1(double a){return a*=a;}int fun2(double x,double y){ double a=0,b=0;a=fun1(x);b=fun1(y)

有以下程序

int fun1(double a){return a*=a;}

int fun2(double x,double y)

{ double a=0,b=0;

a=fun1(x);b=fun1(y);return(int)(a+b);

}

main()

{ double w; w=fun2(1.1,2.0); …… }

程序执行后变量 w 中的值是

A)5.21

B)5

C)5.0

D)0.0