1 #include <assert.h> 2 #include <stdio.h> 3 main()4int main() { 5 for (int i = 0; i < 2; i++) { 6 FILE* file = fopen("/sandbox/input.txt", "r"); 7 assert(file != NULL); 8 9 char c = fgetc(file); 10 while (c != EOF) { 11 int wrote = fputc(c, stdout); 12 assert(wrote != EOF); 13 c = fgetc(file); 14 } 15 } 16 } 17