1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 | #include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
int main(int argc, char* argv[]) {
// Create a text file containing "Yo!" plus a null terminator (weird thing to do).
FILE* fp = fopen("k.txt", "w");
fprintf(fp, "Yo!\n");
fclose(fp); // RULE: If you open a file, you must close it (once).
// Read the file, one character at a time.
printf("Here are the characters:\n");
printf("________________________\n");
fp = fopen("k.txt", "r"); // mode "r" means we want to read a file. "a" means append to the end
for(char ch = fgetc(fp); ! feof(fp); ch = fgetc(fp)) {
printf("character value: %02x %d\n", ch, ch); // %02x means hex >= 2 digits
}
fclose(fp); // RULE: If you open a file, you must close it (once).
printf("\n------------------------\n");
return EXIT_SUCCESS;
}
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