在C/C 中使用vector存放结构体类型变量
在C/C 中，常常需要使用容器来存储结构化数据，其中vector是一个常见且方便的选择。在vector中存放结构体struct类型的变量有两种主要方法。第一种是存放结构体类型变量的副本，第二种是存放指向结构体类型变量的指针。
存放结构体类型变量的副本
```cpp
include
include
include
typedef struct student {
char school_name[100];
char gender;
int age;
bool is_absent;
} StudentInfo;
typedef std::vector
void print(StudentInfoVec *studentinfovec) {
for (int j 0; j < (*studentinfovec).size(); j ) {
std::cout << (*studentinfovec)[j].school_name << " ";
std::cout << (*studentinfovec)[j].gender << " ";
std::cout << (*studentinfovec)[j].age << " ";
std::cout << (*studentinfovec)[j].is_absent << std::endl;
}
}
int main() {
StudentInfo micheal {"Micheal", 'm', 18, false};
StudentInfo cherry {"Cherry", 'f', 16, true};
StudentInfoVec studentinfovec;
studentinfovec.push_back(micheal);
studentinfovec.push_back(cherry);
print(studentinfovec);
system("pause");
return 0;
}
```
存放指向结构体类型变量的指针
```cpp
include
include
include
typedef struct student {
char* school_name;
char gender;
int age;
bool is_absent;
} StudentInfo;
typedef std::vector
void print(StudentInfoPtrVec* studentinfoptrvec) {
for (int j 0; j < (*studentinfoptrvec).size(); j ) {
std::cout << (*studentinfoptrvec)[j]->school_name << " ";
std::cout << (*studentinfoptrvec)[j]->gender << " ";
std::cout << (*studentinfoptrvec)[j]->age << " ";
std::cout << (*studentinfoptrvec)[j]->is_absent << std::endl;
}
}
int main() {
StudentInfoPtrVec studentinfoptrvec;
char* p_char_1 NULL;
p_char_1 new char[100];
strcpy(p_char_1, "Micheal");
StudentInfo* p_student_1 new StudentInfo;
p_student_1->school_name p_char_1;
p_student_1->gender 'm';
p_student_1->age 18;
p_student_1->is_absent false;
studentinfoptrvec.push_back(p_student_1);
char* p_char_2 NULL;
p_char_2 new char[100];
strcpy(p_char_2, "Cherry");
StudentInfo* p_student_2 new StudentInfo;
p_student_2->school_name p_char_2;
p_student_2->gender 'f';
p_student_2->age 16;
p_student_2->is_absent false;
studentinfoptrvec.push_back(p_student_2);
print(studentinfoptrvec);
delete p_char_1;
delete p_student_1;
delete p_char_2;
delete p_student_2;
system("pause");
return 0;
}
```
通过以上两种方式，我们可以灵活地在C/C 中使用vector来存放结构体类型的变量，并根据实际需求选择适合的存储方式。
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