程序分析,给出运算结果.#include \x05class Sample\x05{\x05int x;public:\x05Sample(int a){ x = a; }friend double square(Sample & s);\x05};double square(Sample & s){ return s.x*s.x; }\x05void main()\x05{\x05Sample s1(20);\x05Sample s2(30);\x05c

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$程序分析,给出运算结果.#include \x05class Sample\x05{\x05int x;public:\x05Sample(int a){ x = a; }friend double square(Sample & s);\x05};double square(Sample & s){ return s.x*s.x; }\x05void main()\x05{\x05Sample s1(20);\x05Sample s2(30);\x05c$

程序分析,给出运算结果.#include \x05class Sample\x05{\x05int x;public:\x05Sample(int a){ x = a; }friend double square(Sample & s);\x05};double square(Sample & s){ return s.x*s.x; }\x05void main()\x05{\x05Sample s1(20);\x05Sample s2(30);\x05c
程序分析,给出运算结果.
#include
\x05class Sample
\x05{
\x05int x;
public:
\x05Sample(int a){ x = a; }
friend double square(Sample & s);
\x05};
double square(Sample & s){ return s.x*s.x; }
\x05void main()
\x05{
\x05Sample s1(20);
\x05Sample s2(30);
\x05cout