View Compilation Error

0_0_6964520_24982.cpp: In function `int lowbit(int)':
0_0_6964520_24982.cpp:32: error: `amp' undeclared (first use this function)
0_0_6964520_24982.cpp:32: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6964520_24982.cpp: In function `int main()':
0_0_6964520_24982.cpp:80: error: `amp' undeclared (first use this function)
0_0_6964520_24982.cpp:80: error: expected `)' before ';' token
0_0_6964520_24982.cpp:80: error: expected `;' before ')' token