09/06/25 21:37:04
>>28 課題1
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define FILENAMELEN 64
#define BUFFSIZE 32
int main(void)
{
FILE *fp;
char filename[FILENAMELEN];
char buff[BUFFSIZE];
double x = 0;
int n = 0;
*strchr(fgets(filename, FILENAMELEN, stdin), '\n') = '\0';
fp = fopen(filename, "r");
while (fgets(buff, BUFFSIZE, fp)) { x += strtod(buff, NULL); n++; }
fclose(fp);
printf("%.1lf\n", x / n);
return 0;
}