vector 如何初始化

如下所示

vector<string> strArray(10);
strArray[0] = "hello";
strArray[1] = "world";
strArray[2] = "this";
strArray[3] = "find";
strArray[4] = "gank";
strArray[5] = "pink";
strArray[6 ]= "that";
strArray[7] = "when";
strArray[8] = "how";	
strArray[9] = "cpp";

有没有更好的初始化方式？

7 个解决方案

#1

strArray.push_back("hello"); 
……

#2

string   str[n]={"hello", ...};
vector<string> strArray(str,str+n);

#3

#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main()
{
	string   str[]={"hello", "world", "\n"};
	vector<string> strArray(str,str+sizeof(str)/sizeof(str[0]));
	return 0;
}

#4

#include <iostream>
#include <vector>
#include <string>
using namespace std;

int main()
{
	const char* init[]=
	{
		"A","B","C"
	};

    vector<string> strArray(init,init+3);

	for(vector<string>::iterator iter=strArray.begin();iter!=strArray.end();++iter)
	{
		cout<<*iter<<" ";
	}

	cout<<endl;

    return 0;
}

这样就可以了,话说string有接受const char*的构造函数，构造之后再placement new.

#5

push_back

#6

vector<string> strArray(10，"hello");

#7

string str[]={"hello","world","this","find","gank","pink","that","when","how","cpp"};
vector<string> strArray(str,str+10);