07/08/29 11:26:02
// >>45
// >46を参考に。
#include <stdio.h>
#include <stdlib.h>
#define EOA (-1)
int arr_occur_ct(int const * array, int data)
{
if (array == NULL || data == EOA) return 0;
unsigned count = 0;
for (const int * p = array; * p != EOA; ++p) {
if (* p == data) ++count;
}
return count;
}
int main()
{
int data = EOA;
scanf("%d", & data);
if (data == EOA) return 0;
unsigned cnt = 0;
int * arr = NULL;
do {
int val = EOA;
scanf("%d", & val);
arr = realloc(arr, (cnt + 1) * sizeof(* arr));
arr[cnt] = val;
} while (arr[cnt++] != EOA);
printf("%d\n", arr_occur_ct(arr, data));
return 0;
}