View Compilation Error

0_0_8980520_29335.cpp: In function `int lowbit(int)':
0_0_8980520_29335.cpp:2: error: expected `;' before '}' token
0_0_8980520_29335.cpp: In function `void add(int, int)':
0_0_8980520_29335.cpp:6: error: `n' undeclared (first use this function)
0_0_8980520_29335.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8980520_29335.cpp:8: error: `c' undeclared (first use this function)
0_0_8980520_29335.cpp: In function `int sum(int)':
0_0_8980520_29335.cpp:17: error: `c' undeclared (first use this function)