View Compilation Error

0_0_9341638_11323.cpp:3: error: `main' must return `int'
0_0_9341638_11323.cpp: In function `int main(...)':
0_0_9341638_11323.cpp:4: error: `inta' undeclared (first use this function)
0_0_9341638_11323.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9341638_11323.cpp:4: error: `b' undeclared (first use this function)
0_0_9341638_11323.cpp:5: error: `a' undeclared (first use this function)