View Compilation Error

0_0_5337872_24777.cpp:4: error: `_int64' does not name a type
0_0_5337872_24777.cpp: In function `void eg(int, int)':
0_0_5337872_24777.cpp:15: error: `x' undeclared (first use this function)
0_0_5337872_24777.cpp:15: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_5337872_24777.cpp:16: error: `y' undeclared (first use this function)
0_0_5337872_24777.cpp: In function `int combination(int, int)':
0_0_5337872_24777.cpp:32: error: `x' undeclared (first use this function)
0_0_5337872_24777.cpp:33: error: `h' undeclared (first use this function)
0_0_5337872_24777.cpp: In function `int main()':
0_0_5337872_24777.cpp:48: error: `num1' undeclared (first use this function)
0_0_5337872_24777.cpp:49: error: `num2' undeclared (first use this function)