View Compilation Error

0_0_6046967_2451.cpp: In function `int main()':
0_0_6046967_2451.cpp:38: error: `elseif' undeclared (first use this function)
0_0_6046967_2451.cpp:38: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6046967_2451.cpp:38: error: expected `;' before "unio"