View Compilation Error

378083_0_0_16745.c: In function `main':
378083_0_0_16745.c:3: error: `__int64' undeclared (first use in this function)
378083_0_0_16745.c:3: error: (Each undeclared identifier is reported only once
378083_0_0_16745.c:3: error: for each function it appears in.)
378083_0_0_16745.c:3: error: syntax error before "a"
378083_0_0_16745.c:5: error: `a' undeclared (first use in this function)
378083_0_0_16745.c:5: error: `b' undeclared (first use in this function)
378083_0_0_16745.c:5: error: `EOF' undeclared (first use in this function)
378083_0_0_16745.c:7: error: `c' undeclared (first use in this function)