C++程序设计（PEARSON版）第三版12.2答案

（顺序搜索）重写程序清单7-9中的顺序搜索函数，改写为通用函数。用int、double、string数组测试这个函数

一定一定一定要注意对string类型的传值时的特殊处理，一定要像string（“ANP”）这样，否则函数传值时只能传地址，这样就白费了。

#include "pch.h"
#include<iostream>
#include<string>
using namespace std;
template<typename T>
int SearchCertain(T shuzu[], const int size, T key)
{
	for (int i = 0;i < size; i++)
	{
		if (key == shuzu[i])
		{
			return i;
		}
	}
	return -1;
}
int main()
{
	const int n = 5;
	int a[n] = { 1,3,5,7,2 };
	double b[n] = { 1.2,2.4,3.6,10.24,20.48 };
	string c[n] = { "我","爱","黎","慧","珊" };
	if (SearchCertain(a, n, 5)!=-1)
		cout << "位置是：" << SearchCertain(a,n, 5) << endl;
	else
		cout << "int类型没找到！" << endl;
	if (SearchCertain(b,  n, 2.4)!=-1)
		cout << "位置是：" << SearchCertain(b,n, 2.4) << endl;
	else
		cout << "double类型没找到！" << endl;
	if (SearchCertain(c,n,string("Anna"))!=-1)
		cout << "位置是：" << SearchCertain(c,n,string("Anna")) << endl;
	else//一定要加string的这个外套！！！！！
		cout << "string类型没找到！" << endl;
	return 0;
}