View Compilation Error

0_0_11018763_8797.cpp:25: error: `_TCHAR' has not been declared
0_0_11018763_8797.cpp:26: error: ISO C++ forbids declaration of `argv' with no type
0_0_11018763_8797.cpp: In function `int main(int, int**)':
0_0_11018763_8797.cpp:29: error: `gets_s' undeclared (first use this function)
0_0_11018763_8797.cpp:29: error: (Each undeclared identifier is reported only once for each function it appears in.)