将结构添加到数组中

Question

所以我的问题如下，我有一个像超级市场产品这样的产品，它的结构由一个标识符（标签），其重量和数量组成，并且我的命令是c。

我想做的是将产品添加到数组中并打印其重量。

#include <stdio.h>

int i = 0; // counts the number of products

struct product 
{
   char ident[64]; // string that identifies the product eg. "bread"
   int weight;
   int quant;
};

struct product sistem[10]; // array of products

void add(char ident,int weight,int quant);

struct product make_product(char ident,int weight,int quant)
{
    struct product p1 = {ident,weight,quant};   // creates a product and returns the created product
    return p1;
}

int main() {
    char c; int weight; char ident; int quant;
   scanf("%c %[^:]:%d:%d",&c,ident,&weight,&quant);
   add(ident,weight,quant);

   return 0;
}

void add(char ident,int weight,int quant)
{
   printf("New product %d\n",i);                           //
   sistem[i] = make_product(ident,weight,quant);           // adds a new product into an array of products
   printf("%d\n",sistem[i].weight);                       //
   i++;
}

My input: a bread:2:2

My output: New product 0
           0

Expected output: New product 0
                 2

所以基本上，这不是保存我在数组中创建的产品，我似乎无法理解为什么不是。

因此，如果有人可以帮助我，我将不胜感激。

Answer 1

在scanf中，您将ident用作单个字符，但它应该是64个字符的缓冲区。此更改将需要更改代码的其他部分才能使用char *ident。同样，您不能使用在编译时未知的字符串来初始化这样的结构成员，因此您必须使用strcpy。这应该工作

#include <stdio.h>
#include <string.h>

int i = 0; // counts the number of products

struct product 
{
   char ident[64]; // string that identifies the product eg. "bread"
   int weight;
   int quant;
};

struct product sistem[10]; // array of products

void add(char *ident,int weight,int quant);

struct product make_product(char *ident,int weight,int quant)
{
    struct product p1 = {"",weight,quant};   // creates a product and returns the created product
    strcpy(p1.ident, ident);
    return p1;
}

int main() {
    char c; int weight; char ident[64]; int quant;
   scanf("%c %[^:]:%d:%d",&c,ident,&weight,&quant);
   add(ident,weight,quant);

   return 0;
}

void add(char *ident,int weight,int quant)
{
   printf("New product %d\n",i);                           //
   sistem[i] = make_product(ident,weight,quant);           // adds a new product into an array of products
   printf("%d\n",sistem[i].weight);                       //
   i++;
}