Reading from file and printing double data
I am new to C and try to make a program that reads a segment of data from a file and prints it to the screen. When I declare the array that stores the data read from file as float, it works well. But when I declare it as double, the program prints out only zeros. Can anyone explain why? Am I doing something wrong?
I need to store this data with double precision because of computations that will be done with them later. How can I fix it?
Here is the code:
Thank you in advance!
# include <stdio.h>
int main (void)
FILE *fpIn = fopen( "S001.txt", "r"); // Open input file
const int nsize = 2048;
if (fpIn != NULL) // Successful opening of input file
// Reads from input file first segment of nsize samples into y:
unsigned int i;
int numRead = 0;
for (i = 0; i < nsize; i++ )
numRead = fscanf(fpIn, "%f", &y[i]);
close(fpIn); // Close input file