题目内容

有以下程序#include int fun1( double a ){return (int)(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);printf("%4.2f", w);程序执行后输出结果是（）

A. 0.0
B. 5
C. 5.21
D. 5.00

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