View Compilation Error

0_0_3218162_6824.cpp: In function `int main()':
0_0_3218162_6824.cpp:5: error: `_int64' does not name a type
0_0_3218162_6824.cpp:6: error: `c' undeclared (first use this function)
0_0_3218162_6824.cpp:6: error: (Each undeclared identifier is reported only once for each function it appears in.)