单选题

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

Question

A. 5.21

B. 5

C. 5.0

D. 0.0