1 2 3 4 5 6 7 8 9 10 11 12 13 | class Cat { public : int weight; }; int main() { Cat cat; //声明一个对象 cat.weight=5; cout<< "The cat's weight is " <<cat.weight<<endl; return 0; } |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | class Cat { public : void setWeight( int w){weight=w;} //设置重量 int print(){ return weight;} //返回重量的大小 private : int weight; }; int main() { Cat cat; cat.setWeight(5); //设置cat的重量为5 cout<< "The cat's weight is " <<cat.print()<<endl; return 0; } |
class Cat { public : void setWeight( int w) { if (w>0&&w<50) //这里,我们就可以通过一条简单的if语句启动控制作用 weight=w; } //设置重量 int print(){ return weight;} //返回重量的大小 private : int weight; }; |
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