#include<stdio.h>
#include<math.h>
#define MAX 1000
int m,n,i;
float mean, SD, data[MAX];

FILE *fptr, *gptr;

main(int argc, char *argv[]){
if(argc !=2){
exit(1);}

fptr=fopen(argv[1],"r");
n=0;
do{
fscanf(fptr,"%f",&data[n]);
n=n+1;
}while(!feof(fptr));
 n=n-1; 

mean=0.0;
for(m=0;m<n;m++){
mean=mean+data[m];}
mean=mean/(float)n;

fclose(fptr);

gptr=fopen("report", "w+");
fprintf(gptr, "The mean is %f\n", mean);
fclose(gptr);



}