pc9 6

#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#define NAME_MAX_LEN 30

typedef struct{
  char name[NAME_MAX_LEN];
  double quantity, price;
} Prod;

Prod *exists(Prod prods[], const char *const name, int uniqueNr) {
  for (int i = 0; i < uniqueNr; i++) {
    if (!strcmp(prods[i].name, name)) {
      return &prods[i];
    }
  }
  return NULL;
}

Prod readProd(void) {
  Prod prod;
  scanf("%s %lf %lf", prod.name, &prod.quantity, &prod.price);
  return prod;
}

void displayProd(Prod prod) {
  printf("%s %g, %g\n", prod.name, prod.quantity, prod.price);
}

void processProd(Prod uniqueProds[], Prod prod, double *const totalPrice, int *const uniqueNr) {
  Prod *target = exists(uniqueProds, prod.name, *uniqueNr);
  if (target) {
    target->quantity += prod.quantity;
    target->price += prod.quantity * prod.price;
  } else {
    Prod aux = {
      .quantity = prod.quantity,
      .price = prod.price * prod.quantity
    };
    strcpy(aux.name, prod.name);
    uniqueProds[*uniqueNr] = aux;
    ++*uniqueNr;
  }
  *totalPrice += prod.quantity * prod.price;//*/
}//*/

int main(void) {
  int n, uniqueNr = 0;
  scanf("%d", &n);
  Prod *uniqueProds = (Prod*)malloc(sizeof(Prod) * n);
  double totalPrice = .0;

  for (int i = 0; i < n; i++) {
    Prod prod = readProd();
    processProd(uniqueProds, prod, &totalPrice, &uniqueNr);
  }

  for (int i = 0; i < uniqueNr; i++) {
    displayProd(uniqueProds[i]);
  }

  printf("global price: %g\n", totalPrice);
  free(uniqueProds);//*/
  return 0;
}