View Compilation Error

0_0_8535821_20293.cpp: In function `int main()':
0_0_8535821_20293.cpp:13: error: `_int64' undeclared (first use this function)
0_0_8535821_20293.cpp:13: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8535821_20293.cpp:13: error: expected `;' before "x"