#include <stdio.h>
#include <string.h>
#include <assert.h>
int main()
{
FILE *handle = fopen("file.txt", "r");
char str[128] = {};
fread(str, 1, sizeof(str), handle);
printf("str: %s\n", str);
int success = (strcmp(str, "Hello!") == 0);
assert(success);
printf("OK\n");
return 0;
}