pvjc20/du5/program.c

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

#define SIZE 100

struct student {
    char name[SIZE];
    int votes;
};

int find_student(struct student* students,int size, const char* name){
	for(int i=0; i<size; i++){
		if(!strcmp(students[i].name, name)){
			return i;
		}
	}
    return -1;
}

int compare_votes(const void * a, const void * b){
	if(((struct student*)a)->votes < ((struct student*)b)->votes)
		return 1;
	if(((struct student*)a)->votes == ((struct student*)b)->votes)
		return strcmp(((struct student*)a)->name, ((struct student*)b)->name);
	if(((struct student*)a)->votes > ((struct student*)b)->votes)
		return -1;
}


int main(int argc, char const *argv[]){
	struct student databaza[SIZE];
	memset(databaza,0,SIZE*sizeof(struct student));
	int size = 0;

	while(size!=SIZE){
		char line[SIZE];
		memset(line,0,SIZE);
		char* r = fgets(line,SIZE,stdin);
		if (r == NULL){
			break;
		}
		if(line[0]=='\n'){
			break;
		}

		char* end = NULL;
		int value = strtol(line,&end,10);
		if (value == 0){
			if(size!=0){
				break;
			}
		    printf("Nepodarilo nacitat nic\n");
			return 0;
		}
		char tmp[SIZE];
		memset(tmp, 0, SIZE);
		memcpy(tmp, end+1, strlen(end+1)-1);
		int idx = find_student(databaza, size, tmp);
		if(idx!=-1){
			memcpy(databaza[idx].name, tmp, strlen(tmp));
			databaza[idx].votes += value;
		}
		else{
		memcpy(databaza[size].name, tmp, strlen(tmp));
		databaza[size].votes = value;
		size++;
		}
	}

	qsort(databaza, size, sizeof(struct student), compare_votes);

	printf("Vysledky:\n");
	for(int i=0; i<size; i++){
		printf("%d %s\n", databaza[i].votes, databaza[i].name);
	}
	return 0;
}