STL_Sequence_Vector

最新推荐文章于 2023-08-04 15:55:49 发布

Digital2Slave

最新推荐文章于 2023-08-04 15:55:49 发布

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分类专栏： C++/C 文章标签： C++ STL Sequence

本文链接：https://blog.youkuaiyun.com/tianzhaixing2013/article/details/17286529

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本文介绍了一个使用C++实现的简单程序，该程序演示了如何在一个整数向量中查找特定值，并返回该值的迭代器。通过用户输入目标整数进行查找，程序能够判断该整数是否存在于向量中。

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#include <iostream>
#include <vector>
#include <string>
#include <cstdlib>//return 数值不因机器环境而变

using namespace std;

vector<int>::iterator findint(vector<int>::iterator beg,
	                                              vector<int>::iterator end, int ival)
{
	while (beg != end)
	{
		if (*beg == ival){
			break;
		} 
		else{
			++beg;
		}
	}
	return beg;
}

void DemonFunction(char * Demon)
{
	cout << "************************************************************ \n"
		<< "This program is an implemation of  sequence vector! \n"
		<<  Demon << "\n"
		<< "Function:Find a integer in a vector and return its iterator.\n"
		<< "Edited by:John tian\n"
		<< "Date: 12/10/2013\n"
		<< "************************************************************ "
		<< endl;
}
int main()
{
	char *Demon = "Vector Demon";
	DemonFunction(Demon);

	int ia[] = { 0, 1, 2, 3, 4, 5, 6 };
	vector<int> ivec(ia, ia + 7);
	//read data for finding
	cout << "Enter a integer:" << endl;
	int ival;
	cin >> ival;

	//findint function 
	vector<int>::iterator it;
	it = findint(ivec.begin(), ivec.end(), ival);
	if (it != ivec.end()){
		cout << ival << " is a element of the vector." << endl;
	} 
	else{
		cout << ival << " isn't a element of the vector." << endl;
	}
	return EXIT_SUCCESS;
}