modernc.org/ccgo/v3@v3.16.14/lib/testdata/gcc-9.1.0/gcc/testsuite/gcc.c-torture/execute/990222-1.c (about)

     1  char line[4] = { '1', '9', '9', '\0' };
     2  
     3  int main()
     4  {
     5    char *ptr = line + 3;
     6  
     7    while ((*--ptr += 1) > '9') *ptr = '0';
     8    if (line[0] != '2' || line[1] != '0' || line[2] != '0')
     9      abort();
    10    return 0;
    11  }