halloween_sale.c

#include <assert.h>
#include <limits.h>
#include <math.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

char* readline();
char** split_string(char*);

// Complete the howManyGames function below.
int howManyGames(int p, int d, int m, int s) {
    // Return the number of games you can buy

}

int main()
{
    FILE* fptr = fopen(getenv("OUTPUT_PATH"), "w");

    char** pdms = split_string(readline());

    char* p_endptr;
    char* p_str = pdms[0];
    int p = strtol(p_str, &p_endptr, 10);

    if (p_endptr == p_str || *p_endptr != '\0') { exit(EXIT_FAILURE); }

    char* d_endptr;
    char* d_str = pdms[1];
    int d = strtol(d_str, &d_endptr, 10);

    if (d_endptr == d_str || *d_endptr != '\0') { exit(EXIT_FAILURE); }

    char* m_endptr;
    char* m_str = pdms[2];
    int m = strtol(m_str, &m_endptr, 10);

    if (m_endptr == m_str || *m_endptr != '\0') { exit(EXIT_FAILURE); }

    char* s_endptr;
    char* s_str = pdms[3];
    int s = strtol(s_str, &s_endptr, 10);

    if (s_endptr == s_str || *s_endptr != '\0') { exit(EXIT_FAILURE); }

    int answer = howManyGames(p, d, m, s);

    fprintf(fptr, "%d\n", answer);

    fclose(fptr);

    return 0;
}

char* readline() {
    size_t alloc_length = 1024;
    size_t data_length = 0;
    char* data = malloc(alloc_length);

    while (true) {
        char* cursor = data + data_length;
        char* line = fgets(cursor, alloc_length - data_length, stdin);

        if (!line) { break; }

        data_length += strlen(cursor);

        if (data_length < alloc_length - 1 || data[data_length - 1] == '\n') { break; }

        size_t new_length = alloc_length << 1;
        data = realloc(data, new_length);

        if (!data) { break; }

        alloc_length = new_length;
    }

    if (data[data_length - 1] == '\n') {
        data[data_length - 1] = '\0';
    }

    data = realloc(data, data_length);

    return data;
}

char** split_string(char* str) {
    char** splits = NULL;
    char* token = strtok(str, " ");

    int spaces = 0;

    while (token) {
        splits = realloc(splits, sizeof(char*) * ++spaces);
        if (!splits) {
            return splits;
        }

        splits[spaces - 1] = token;

        token = strtok(NULL, " ");
    }

    return splits;
}