09/07/15 22:57:39
>>135
#include <stdio.h>
void func(int *max, int *min, int *num, double *ave)
{
int a, n;
FILE *fp = fopen("tensu.txt", "r");
if (fp == NULL) { fprintf(stderr, "file open error."); exit(1); }
if (fscanf(fp, "%d", &a) == EOF) { *num = 0; return; }
*max = *min = *ave = a;
*num = 1;
while (fscanf(fp, "%d", &a) != EOF) { if (*max < a) *max = a; if (*min > a) *min = a; *ave += a; (*num)++; }
*ave /= *num;
fclose(fp);
}
int main(void)
{
int max, min, num;
double ave;
func(&max, &min, &num, &ave);
printf("最大値 = %d, 最小値 = %d, データ個数 = %d, 平均値 = %f\n", max, min, num, ave);
return 0;
}