View Compilation Error

0_0_8832788_490.cpp:7: error: `i' was not declared in this scope
0_0_8832788_490.cpp:8: error: expected `,' or `;' before '{' token
0_0_8832788_490.cpp: In function `void Add(int, int)':
0_0_8832788_490.cpp:15: error: `lowbit' cannot be used as a function
0_0_8832788_490.cpp: In function `int sum(int)':
0_0_8832788_490.cpp:23: error: `lowbit' cannot be used as a function
0_0_8832788_490.cpp: At global scope:
0_0_8832788_490.cpp:31: error: `main' must return `int'