我试图读取标准输入行并将每个字符串放在一行(用空格分隔)到矢量字符串向量的索引中,然后将每一行放在一个单独的索引中,但我&#39 ;我混淆了如何使用getline来做这件事。
例如,说我的标准是:
Hello
I want a
sand wich
字符串向量的向量看起来像:
0: {"Hello"}
1: {"I", "want", "a"}
2: {"sand", "wich"}
我试图编写类似这样的代码:
vector <vector <string> > name;
string line, s;
int count= -1;
while(getline(cin, line, '\n'))
{
count++;
while (getline(line, s, ' '))
{
name[count].push_back(s);
}
}
这会做我想做的事吗?
哦,所以用字符串流,像这样?
vector <vector <string> > name;
string line, string;
stringstream ss;
int count= -1;
while(getline(cin, line, '\n'))
{
count++;
ss.str(line);
while (ss >> string)
{
name[count].push_back(string);
}
ss.clear();
}
答案 0 :(得分:1)
您可以尝试以下代码。
vector <vector <string> > name;
vector<string> tmp;
string line, str;//It should not be string
stringstream ss;
int count= -1;//no need for count variable as pushing to a vector starts from 0
while(getline(cin, line, '\n'))
{
count++;
ss.str(line);
while(ss >> str)
{
tmp.push_back(str);//extracting tokens of string in tmp vector
}
name.push_back(tmp);//pushing vector of string to main vector
tmp.clear();
ss.clear();
}