如何更改C数组中的结构？

struct Person {
    char name[20];
    int age;
};

struct PersonWithGender {
    char name[20];
    int age;
    char gender;
};

struct PersonWithGender personArrayWithGender[arrayLength];

for (int i = 0; i < arrayLength; i++) {
    strcpy(personArrayWithGender[i].name, personArray[i].name);
    personArrayWithGender[i].age = personArray[i].age;
}

for (int i = 0; i < arrayLength; i++) {
    personArrayWithGender[i].gender = 'M'; // 或者根据实际情况设置性别
}