59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define LINE_LEN 100
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#define LIST_SIZE 128
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typedef struct {
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char name[LINE_LEN];
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float price;
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} pizza;
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int get_line(char *name);
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int get_pizza(pizza *p_item);
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int compare_pizza(const void* pVoid1, const void* pVoid2);
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int main() {
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pizza items[LIST_SIZE];
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memset(items,0,sizeof(items));
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int count = 0;
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while(get_pizza(items + count)) {
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count++;
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}
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qsort(items, count, sizeof(pizza), compare_pizza);
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int i = 0;
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while(i < count) {
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printf("%s\n%f\n", items[i].name, items[i].price);
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i++;
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}
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return 0;
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}
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int get_line(char *name)
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{
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memset(name, 0, LINE_LEN);
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char* r = fgets(name, LINE_LEN, stdin);
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if (r == NULL || name[1] == 0) {
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return 0;
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}
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int n = strlen(name);
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if (name[n - 1] == '\n')
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name[n - 1] = 0;
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return 1;
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}
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int get_pizza(pizza *p_item)
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{
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int res = get_line(p_item->name);
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char price_string[LINE_LEN];
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res += get_line(price_string);
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if (res != 2) return 0;
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sscanf(price_string, "%f", &(p_item->price));
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if(p_item->price == 0.) return 0;
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return 1;
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}
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int compare_pizza(const void* pVoid1, const void* pVoid2) {
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pizza* pPizza1 = (pizza*) pVoid1;
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float price1 = pPizza1->price;
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pizza* pPizza2 = (pizza*) pVoid2;
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float price2 = pPizza2->price;
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float r = price1 - price2;
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if (r > 0.) return 1;
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if (r < 0.) return -1;
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if (r == 0.) return 0;
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}
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