Modern C Up and Running by Martin Kalin

Author:Martin Kalin
Language: eng
Format: epub
ISBN: 9781484286760
Publisher: Apress

Through a stream, a channel that connects a source and a destination: the file could be either the source (read operation) or destination (write operation).

To study the API for the high-level I/O is, in effect, to study various ways of managing I/O streams. The forthcoming examples do so.#include <stdio.h>

#define FILE_NAME "data.in"

void main() {

float num;

printf("A floating-point value, please: ");

int how_many_floats = fscanf(stdin, "%f", &num); /* last arg must be an address */

if (how_many_floats < 1)

fprintf(stderr, "Bad scan -- probably bad characters
");

else

fprintf(stdout, "%f times 2.1 is %f
", num, num * 2.1);

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