pvjc22/du5/program.c

#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define SIZE 100

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


int find_student(struct student* students,int size, const char* name);

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

int main(){

    struct student databaza[SIZE];
        memset(databaza,0,SIZE*sizeof(struct student));
        int size = 0;

    while(1){
        char line[SIZE];
        memset(line,0,SIZE);
        char* r = fgets(line,SIZE,stdin);
        if (r == NULL){
            // Nastal koniec načítania
            break;
        }

        char* end = NULL;
        int value = strtol(line,&end,10);
        if (value == 0&&line[0]=='\n'){
            // Premena sa nepodarila
            break;
        }else if(value==0&&line[0]!='\n'){
	    printf("Nepodarilo nacitat nic\n");
	    return 0;
	}
        char *name=end+1;

        int id = find_student(databaza,size,name);
        if (id< 0){

            memcpy(databaza[size].name,name,strlen(name)+1);
            databaza[size].votes=value;

            size+=1;
        }
        else {
            databaza[id].votes+=value;
        }
        if(size>1){
            //printf("=====================================\n");
            qsort(databaza, size, sizeof(struct student), compare);
        }
    }
    printf("Vysledky:\n");
    for(int idx=0;databaza[idx].name[0]!='\0';idx++)
        printf("%d %s", databaza[idx].votes, databaza[idx].name);

    //printf("\n");
    return EXIT_SUCCESS;
}

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

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

    //printf("============\n");
    int res=(s2->votes)-(s1->votes);

    for(int idx=0;res==0&&idx<SIZE;idx++){
        res=(int)(s1->name[idx])-(int)(s2->name[idx]);
        //printf("%d, %c, %c\n",res,s2->name[idx],s1->name[idx]);
    }

    return res;
}