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//6.2.3const形参和实参.cpp
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#include <iostream>
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using namespace std;
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void fa(const int as);
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void fb(int as);
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int main(){
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int x=1,y=2;
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const int a=1,b=2;
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fa(x);
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fa(a);
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fb(y);
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fb(b);
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return 0;
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}
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void fa(const int as){
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// 无法修改值
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}
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void fb(int as){
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// 可修改值
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as=12;
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}
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