usaa21/cv2/program.c

#include <stdio.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>

#define velkost strlen
#define size 100

struct jedlo {
    char name[size];
    float price;
};

int compare(const void* p1,const void*p2);

int main() {

    struct jedlo databaza[size];
    char input[100]= {0};
    float price = 0;
    int counter = 0;
    int helper = 2;
    int counter2 = 0;
    int yes = 0;
    
    while(fgets(input, sizeof(input), stdin) && strcmp( input, "\n" ) != 0 ){
        if(helper %2 == 0){
            strcpy(databaza[counter].name, input);
            yes++;
        }
        else{
            price = strtof(input, NULL);
            databaza[counter].price = price;
            yes++;
        }
        if(yes == 2){
            counter++;
            yes = 0;
        }
        counter2++;
        helper++;
    }

    counter2 = (counter2 / 2);
    qsort(databaza, counter2,sizeof(struct jedlo),compare);

    for(int z=0; z<counter2; z++){
        printf("%s", databaza[z].name);
        printf("%f\n", databaza[z].price);        
    }

}

int compare(const void* p1,const void*p2){
    struct jedlo s1 = *(const struct jedlo*)p1;
    struct jedlo s2 = *(const struct jedlo*)p2;

    int order;

	if(s1.price > s2.price){
	    order =  1;
	}
    else if(s1.price < s2.price){
	    order = -1;
	}
    else {
        order = 0;
    }
	return order;
}