プログラマ専用SNS ミクプラ

コード:

#include <stdio.h>
#include <stdlib.h>
#include <math.h>

int main(void){
	char *fnm="Book1.txt";
	FILE *dat;
	char *p,chs[100];
	int ten;
	int n=0;
	int min;
	int max;
	double avr;
	double sdv;

	dat = fopen(fnm,"r");
	sdv = avr = 0;
	while(fgets(chs,100,dat)!=NULL){
		ten = strtol(chs,&p,10);
		if(n==0){
			min = max = ten;
		}
		min = (min>ten)? ten:min;
		max = (max<ten)? ten:max;
		avr = avr+ten;
		sdv = sdv+ten*ten;
		n++;
	}
	avr = avr/n;
	sdv = sqrt(sdv/n-avr*avr);
	printf("最大 = %d\n",max);
	printf("最小 = %d\n",min);
	printf("平均 = %f\n",avr);
	printf("偏差 = %f\n",sdv);
	fclose(dat);
	return 0;
}