Unable to read a structure from a text file in C - c

Question

#include <stdio.h>
#include <stdlib.h>
typedef struct
{
int id;
char* name;
float weight;
} Person;
int main()
{
Person *person=malloc(10*sizeof(Person));
int i=0;
char row[20];
FILE *input=fopen("input.txt","r+");
while(fscanf( input, "%s", &row)>0) i++;
i/=5;
printf("%d\n", i);
fseek(input,0,SEEK_SET);
int j;
char string[20];
for (j=0;j<i;j++){
fscanf(input,"%s",string);
fscanf(input,"ID:%d",&person[j].id);
fscanf(input,"Name:%s",person[j].name);
fscanf(input,"Weight:%f",&person[j].weight);
fscanf(input,"%s",string);
}
fclose(input);
//Person:{
//ID:1214124141
//Name:Trump
//Weight:101.50
//}
//Person:{
//ID:5235252525
//Name:Obama
//Weight:78.30
//}
return 0;
}
Hello!
I want to read a structure from a file, but my array person contains only 0 even after I read from the file. My input file has the structure shown in the comment lines.
What am I not doing well?
Thanks a lot for the help!

Answer 1

fix like this
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
typedef struct {
long long int id;//32bit int can't hold like 5235252525
char name[20];//Allocate space
float weight;
} Person;
#define FORMAT "%*s ID:%lld Name:%19[^\n] Weight:%f %*s"
int main(void){
FILE *input=fopen("input.txt", "r+");
if(!input){
perror("fopen");
return -1;
}
int n = 0;
Person p;
while(3==fscanf(input, FORMAT, &p.id, p.name, &p.weight))
++n;
printf("number of record: %d\n", n);
Person *person = malloc(n * sizeof(Person));
if(!person){
perror("malloc");
fclose(input);
return -2;
}
rewind(input);
for (int i = 0; i < n; ++i){
fscanf(input, FORMAT, &person[i].id, person[i].name, &person[i].weight);
}
fclose(input);
//check print
for (int i = 0; i < n; ++i){
printf("ID:%lld, Name:%s, Weight:%.2f\n", person[i].id, person[i].name, person[i].weight);
}
free(person);
return 0;
}