C++模板小例

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#include <IOSTREAM>using namespace std;/*模板template的应用*/template<class type> //使用模板将type定义成一个可根据实际情况被编译器自动识别并设定的数据类型tswap(type & a, type & b){type temp;temp = a;a = b;b = temp;}int main(){int x = 6, y = 8;cout<<"交换前,x:"<<x<<" y:"<<y<<endl;tswap(x, y);cout<<"交换后,x:"<<x<<" y:"<<y<<endl;float f = 12.567f, j = 93.789f;cout.precision(12);//精度是指总共输出的有效位数(包括整数部分和小数部分).cout<<"交换前,f:"<<f<<" j:"<<j<<endl;tswap(f, j);cout<<"交换后,f:"<<f<<" j:"<<j<<endl;double g = 34.09899, k = 893.0983457;cout<<"交换前,g:"<<g<<" k:"<<k<<endl;//浮点数精度更高，所以此处能被精确输出。tswap(g, k);cout<<"交换后,g:"<<g<<" k:"<<k<<endl;return 0;}/*交换前,x:6 y:8交换后,x:8 y:6交换前,f:12.5670003891 j:93.7890014648交换后,f:93.7890014648 j:12.5670003891交换前,g:34.09899 k:893.0983457交换后,g:893.0983457 k:34.09899Press any key to continue*/

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