1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
int main(int argc, char* argv[]) {
// fopen returns NULL if an error occured
//FILE* file = fopen("new_file.txt", "r");
FILE* file = fopen("file_does_not_exist.txt", "r");
if (file != NULL) {
char ch = fgetc(file);
// fputc returns EOF if unsuccessful
if (fputc('A', file) == EOF) {
// print the fputc error
// ferror(file) returns the last error from file
printf("Error %d occured:\n%s\n",
ferror(file), strerror(ferror(file)));
}
printf("Character %c\n", ch);
fclose(file);
} else {
// print the fopen error
// errno contains the last error that C received
printf("Error %d occured:\n%s\n", errno, strerror(errno));
}
return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */
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