primer_C++_3.3 标准库类型vector

 

   

    

/*
*  用cin读入一组整数并把他们存入一个vector对象
*/

#include <iostream>
#include <vector>

using namespace std;
int main()
{
cout << "输入一组整数：";
	int v2;
	vector<int> v1;		//创建vector对象
//	for (int t=0;t!=100;++t)
//		v1.push_back(t);
	while (cin >> v2) {
		v1.push_back(v2);	//把v2添加到v1后面
	}
	cout << "输出vector:";
	for(auto c:v1)
	cout << c;
	return 0;
}

#include <iostream>
#include <string>
#include <vector>

using namespace std;
int main()
{
cout << "输入一组字符串：";
	string v2;
	vector<string> v1;		//创建vector对象
	while (cin >> v2) {
		v1.push_back(v2);	//把v2添加到v1后面
	}
	cout << "输出vector:";
	for(auto c:v1)
	cout << c;
	return 0;
}

#include <iostream>
#include <string>
#include <vector>

using namespace std;
int main()
{
	vector<string> v1;	//创建一个空vector对象
	string v2;			
	while (cin >> v2){		//输入字符串
		v1.push_back(v2);	//把v2添加到v1后面
	}
	for (auto &t : v1)		//读取vector中的每个元素
		for (auto &a : t)	//对读取的元素的每个字符串进行操作
			a = toupper(a);	//对小写字母转成大写
 
	for(auto t:v1 )			//读取v1中的每个元素
		cout << t << endl;
	return 0;
}

不合法，ivec为空vector。 

vector<int> ivec {0};

ivec[0]=42;

vector<int> v1 {42,42,42,42,42,42,42,42,42,42};
vector<int> v2 (10,42);
vector<int> v3 = v2;

 

#include <iostream>
#include <vector>
using namespace std;
int main()
{
	cout << "输入一组整数：" << endl;
	vector<int> v1;
	int a ;
	while (cin >> a ) 
		v1.push_back(a);
	if (v1.size() == 1) {   //输入一个值时
		cout << v1[0];
	}else {
		for (int i = 0; i < v1.size() - 1; ++i) {    
			cout << v1[i] + v1[i + 1]<<endl;
		}
	}
	return 0;
}