View Compilation Error

2_13622_918560_19686.cpp:1: error: `__int64' does not name a type
2_13622_918560_19686.cpp: In function `int main()':
2_13622_918560_19686.cpp:14: error: `__int64' undeclared (first use this function)
2_13622_918560_19686.cpp:14: error: (Each undeclared identifier is reported only once for each function it appears in.)
2_13622_918560_19686.cpp:14: error: expected `;' before "n"
2_13622_918560_19686.cpp:15: error: `f' undeclared (first use this function)
2_13622_918560_19686.cpp:19: error: `i' undeclared (first use this function)
2_13622_918560_19686.cpp:21: error: `n' undeclared (first use this function)
2_13622_918560_19686.cpp:21: error: `m' undeclared (first use this function)
2_13622_918560_19686.cpp:21: error: `scanf' undeclared (first use this function)
2_13622_918560_19686.cpp:21: error: `EOF' undeclared (first use this function)
2_13622_918560_19686.cpp:23: error: `C' undeclared (first use this function)
2_13622_918560_19686.cpp:23: error: `printf' undeclared (first use this function)