结构初始化向量

我想知道如何使用以下方法将值添加到我的结构向量中push_back method

struct subject
{
  string name;
  int marks;
  int credits;
};


vector<subject> sub;

那么现在我该如何向其中添加元素呢？

我有初始化字符串名称（主题名称）的函数

void setName(string s1, string s2, ...... string s6)
{
   // how can i set name too sub[0].name= "english", sub[1].name = "math" etc

  sub[0].name = s1 // gives segmentation fault; so how do I use push_back method?

  sub.name.push_back(s1);
  sub.name.push_back(s2);
  sub.name.push_back(s3);
  sub.name.push_back(s4);

  sub.name.push_back(s6);

}

函数调用

setName("english", "math", "physics" ... "economics");

创建向量，push_back元素，然后修改它如下：

struct subject {
    string name;
    int marks;
    int credits;
};


int main() {
    vector<subject> sub;

    //Push back new subject created with default constructor.
    sub.push_back(subject());

    //Vector now has 1 element @ index 0, so modify it.
    sub[0].name = "english";

    //Add a new element if you want another:
    sub.push_back(subject());

    //Modify its name and marks.
    sub[1].name = "math";
    sub[1].marks = 90;
}

在向量中该索引处存在元素之前，无法使用 [#] 访问向量。此示例填充 [#]，然后对其进行修改。