#include<stdio.h>#include<stdlib.h>intmain(void){FILE*f=0;floata[65338][6];inti,j;f=fopen("a.txt","r");if(!f)return0;for(i=0;i<65338;i++)for(j=0;j<6;j++)fscanf(f,"%f",&(a[i][j]));/*已經讀完了*/fclose(f);printf("%.7e\n",a[2][4]);return0;}