View Compilation Error

0_0_6870268_17192.cpp: In function `int main()':
0_0_6870268_17192.cpp:20: error: `_int64' undeclared (first use this function)
0_0_6870268_17192.cpp:20: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_6870268_17192.cpp:20: error: expected `;' before "c1"
0_0_6870268_17192.cpp:23: error: `c1' undeclared (first use this function)
0_0_6870268_17192.cpp:24: error: `c2' undeclared (first use this function)