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#include <assert.h>
#include <stdio.h>
int main() {
FILE* file_orig = fopen("/sandbox/input.txt", "r");
assert(file_orig != NULL);
FILE* file_new = freopen("/sandbox/input2.txt", "r", file_orig);
assert(file_new != NULL);
int c = fgetc(file_new);
while (c != EOF) {
int wrote = fputc((char)c, stdout);
assert(wrote != EOF);
c = fgetc(file_new);
}
}
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