Why does char* do this in struct?

problem description

I want to read out the contents of a text file, but I don"t know why the line read is stored in the char * type of my custom struct type, which always modifies the previous read char *. I marked out the problem with comments

related codes


-sharpdefine _CRT_SECURE_NO_WARNINGS
-sharpinclude<stdio.h>
-sharpinclude<string.h>
-sharpinclude<stdlib.h>
-sharpdefine SIZE 100
-sharpdefine QUEUE_SIZE 100
-sharpdefine TRUE 1
-sharpdefine FALSE 0
typedef int bool;

struct Customer
{
    char *name;
    int arrivedTime;
    int priority;
    int age;
    int requireTime;
};

struct Queue
{
    struct Customer customers[QUEUE_SIZE];
    int size;
};

bool addCustomer(struct Queue* queue,struct Customer customer) {
    if (queue->size >= QUEUE_SIZE) {
        return FALSE;
    }
    else {
        queue->customers[queue->size] = customer;
        queue->sizePP;
        return TRUE;
    }
}

struct Customer getCustomer(struct Queue* queue,int index) {
    return queue->customers[index];
    for (int i = index; i < queue->size-1; iPP) {
        queue->customers[i] = queue->customers[i + 1];
    }
    queue->size--;
}

int main() {
    struct Queue queue;
    queue.size = 0;
    FILE * file=fopen("C:\\Users\\zjb52\\Desktop\\cs\\sample-input.txt", "r");
    if (file == NULL) {
        printf("File not found");
    }
    else {
        char buffer[SIZE];
        while(fgets(buffer, SIZE, file) != NULL) {
            struct Customer customer;
                        
            //s1,queues0s1
            customer.name = strtok(buffer, " ");
            customer.arrivedTime = atoi(strtok(NULL, " "));
            customer.priority = atoi(strtok(NULL, " "));
            customer.age = atoi(strtok(NULL, " "));
            customer.requireTime = atoi(strtok(NULL, " "));
            addCustomer(&queue, customer);    
        }        
    }
    fclose(file);
    system("pause");
    return 0;
}

sample-input.txt

s0 0 3 0 10
s1 0 6 0 20
s2 0 5 0 11
s3 0 6 0 20
s4 67 2 0 25
s5 5 4 0 1
s6 0 2 0 5
s7 0 4 0 28
s8 0 3 0 20
s9 45 5 0 6
s10 103 3 0 2

what result do you expect? What is the error message actually seen?

customer.name = strtok (buffer, "" in the while loop; what I expect is that after reading, the customer.name in the queue should be s0mems1, s2.s9, S10, but the result is all S10. Why is the char * type name in struct like this? How should I change it? Thank you

Apr.28,2021

-sharpinclude<stdio.h> -sharpinclude<string.h> typedef struct student{ char *name; char num; }student; int main() { char i = 0; while(i < 10){ student xie; xie.name = &i; xie.num = i; printf("0x%p\n",xie.name); printf("%d\n",xie.num); iPP; } }

char buffer[SIZE]; while(fgets(buffer, SIZE, file) != NULL) { struct Customer customer; strcpy(customer.name,strtok(buffer, " ")); customer.arrivedTime = atoi(strtok(NULL, " ")); customer.priority = atoi(strtok(NULL, " ")); customer.age = atoi(strtok(NULL, " ")); customer.requireTime = atoi(strtok(NULL, " ")); addCustomer(&queue, customer); }