Programming in C: Changing member value of struct gives segfault - c

Question

There are quite a few topics on this subject but I haven't been able to find a solution that's worked for me; I am getting a segmentation fault whenever I try to change student_t.member->name. Below is the typedef structure that I am required to use:
typedef struct degree_t degree_t;
typedef struct student_t student_t;
struct degree_t {
student_t* member;
int course_id;
}
struct student_t {
char* name;
int age;
}
int main(int argc, char* argv[]) {
student_t *students = malloc(sizeof(student_t) * 3);
degree_t *degrees = malloc(sizeof(degree_t));
for (int i=0; i<3; i++) {
degrees[i].course_id = 1;
degrees[i].member->name = "Bob";
}
return 0;
}
I can change degrees[i].course_id perfectly fine, but whenever I try to change degrees[i].member -> name, I get a segmentation fault.
GDB indicates that this is a result of the line degrees[i].member->name = "Bob", but I'm don't understand why, and I don't know how to effectively change the value of degrees[i].member->name

Answer 1

Oops, you managed to place four errors in that small program.
The signature of main() should be main(int argc, char *argv[]). argv is an array of strings found on the command line.
You allocate memory for one degree, but in the for-loop you initialize three of them. This leads to a heap corruption.
You don't initialize degrees->member, but use it.
You allocate memory for three students, but don't use it.
Try this:
struct degree_t {
student_t* member;
int course_id;
}
struct student_t {
const char* name;
int age;
}
int main(int argc, char* argv[]) {
degree_t *degrees = malloc(3 * sizeof(degree_t));
for (int i=0; i<3; i++) {
degrees[i].course_id = 1;
degrees[i].member = malloc(sizeof(student_t));
degrees[i].member->name = "Bob";
degrees[i].member->age = 23;
}
return 0;
}