Sha256: ce4b65c93b0a573f227e0e294ea17edf02802f72e5f0178a26eb5be7e3006811
Contents?: true
Size: 1.14 KB
Versions: 63
Compression:
Stored size: 1.14 KB
Contents
#include "diamond.h"
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <string.h>
char **make_diamond(const char letter)
{
if (!isalpha(letter))
return NULL;
const char letter_upper = toupper(letter);
const size_t row_count = 2 * (letter_upper - 'A' + 1) - 1;
const size_t col_count = row_count + 1;
char **diamond = malloc(sizeof(char *) * row_count);
if (diamond == NULL) {
fprintf(stderr, "Memory error!\n");
return NULL;
}
char *all_rows = malloc(row_count * col_count);
if (all_rows == NULL) {
fprintf(stderr, "Memory error!\n");
free(diamond);
return NULL;
}
memset(all_rows, ' ', row_count * col_count);
const size_t middle = row_count / 2;
char curr_char = 'A';
int advance = 1;
for (size_t row = 0; row < row_count; row++) {
diamond[row] = &all_rows[row * col_count];
diamond[row][col_count - 1] = '\0';
diamond[row][middle + (curr_char - 'A')] = curr_char;
diamond[row][middle - (curr_char - 'A')] = curr_char;
if (curr_char == letter_upper)
advance = -1;
curr_char += advance;
}
return diamond;
}
Version data entries
63 entries across 63 versions & 1 rubygems