View Compilation Error

0_0_4065136_26761.cpp: In function `int main()':
0_0_4065136_26761.cpp:10: error: `d' undeclared (first use this function)
0_0_4065136_26761.cpp:10: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_4065136_26761.cpp:10: error: expected `;' before "while"