View Compilation Error

0_0_1650718_16217.cpp: In member function `void sat2::init(int)':
0_0_1650718_16217.cpp:24: error: `ans' undeclared (first use this function)
0_0_1650718_16217.cpp:24: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1650718_16217.cpp: At global scope:
0_0_1650718_16217.cpp:71: error: `sat2 ans' used prior to declaration
0_0_1650718_16217.cpp: In function `void init()':
0_0_1650718_16217.cpp:74: error: return-statement with a value, in function returning 'void'
0_0_1650718_16217.cpp:88: error: return-statement with a value, in function returning 'void'
0_0_1650718_16217.cpp: In function `int main()':
0_0_1650718_16217.cpp:91: error: could not convert `init()' to `bool'