usaa24/cv2/program.c

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

#define LINE_SIZE 100
#define LIST_SIZE 200

struct pizza
{
   char name[LINE_SIZE];
   float prize;
};

int read_pizza_list(struct pizza* list);  

int compare_pizza (const void * a, const void * b)
{
    struct pizza* p1=(struct pizza*)a;
    struct pizza* p2=(struct pizza*)b;

    if( p1->prize > p2->prize )
    {
        return 1;
    }
    
    
    if( p1->prize < p2->prize )
    {
        return -1;
    }

    return strcmp(p1->name, p2->name);
}  


int main()
{
    struct pizza list[LIST_SIZE];
    memset(list,0,LIST_SIZE*sizeof(struct pizza));

    int n=read_pizza_list(list);
    printf("%d",n);
    for(int k=0; k<n; k++)
      printf("\n%s   %f",list[k].name, list[k].prize);

	return 0;
}


int read_item(struct pizza *r) 
{
    char*p;
    int st;
    do
    {
        p=fgets(r->name, 299, stdin);
    }while(p!=NULL && p[0]=='\n');

    if(p==NULL) {return 0;}

    st=scanf("%f", &r->prize);

      

    if(st==1)   
        {return 1;}  
    else 
        {return 0;}   
}


int read_pizza_list(struct pizza* list)   
{   
    int counter = 0;
    for (int i=0; i< LIST_SIZE; i++)
    {
        struct pizza item;
        memset(&item,0,sizeof(struct pizza));
    
        int r = read_item(&item);
        if (r)
        {        
            memcpy(&list[i],&item,sizeof(struct pizza));         
            counter += 1;
        }
        else
        {
           
            break;
        }
    }

    return counter;

}