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#include <stdio.h>
#include <string.h>
typedef struct inventory {
unsigned int id;
char name[50];
unsigned int quantity;
unsigned int price;
} inventory;
int main() {
// create a file, enter the records
FILE* p = fopen("inventaire.txt", "w+");
printf("please, write the number of products \n");
int n;
char t = ' ';
scanf("%d", &n);
inventory obj1[100];
printf("please write the name then quantity and the price of each product\n");
for (int i = 0; i < n; i++) {
printf("the product %d:\n", i + 1);
scanf("%s", &obj1[i].name);
scanf("%d", &obj1[i].quantity);
scanf("%d", &obj1[i].price);
obj1[i].id = i;
fprintf(p, "%d %c %s %c %d %c %d", obj1[i].id, t, obj1[i].name, t,
obj1[i].quantity, t, obj1[i].price);
fputs("\n", p);
}
// read file, update record fields
fseek(p, 0, SEEK_SET);
for (int i = 0; i < n; i++)
fscanf(p, "%d %c %s %c %d %c %d %c", &obj1[i].id, &t, &obj1[i].name, &t,
&obj1[i].quantity, &t, &obj1[i].price, &t);
printf("write the number of product that you want to change it quantity\n");
int number_of_apdate;
scanf("%d", &number_of_apdate);
for (int i = 0; i < number_of_apdate; i++) {
char name[50];
printf("write the name of the prodeuct\n");
scanf("%s", name);
for (int i = 0; i < n; i++) {
if (strcmp(name, obj1[i].name) == 0) {
printf("write the size that you want to add it\n");
int size;
scanf("%d", &size);
obj1[i].quantity += size;
}
}
}
fseek(p, 0, SEEK_SET);
for (int i = 0; i < n; i++) {
fprintf(p, "%d %c %s %c %d %c %d", obj1[i].id, t, obj1[i].name, t,
obj1[i].quantity, t, obj1[i].price);
fputs("\n", p);
}
fclose(p);
}
this code had a incorrect result
"incorrect result" is not information that would allow to offer any help, you need to be specific
incorrect scanning the data from file
Thank you and let us know if you have any more questions!
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@empty knot
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