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

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