View Compilation Error

0_0_12303836_226.cpp:1:20: cstdio.h: No such file or directory
0_0_12303836_226.cpp: In function `int main()':
0_0_12303836_226.cpp:4: error: `scanf' undeclared (first use this function)
0_0_12303836_226.cpp:4: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_12303836_226.cpp:5: error: `__int64' undeclared (first use this function)
0_0_12303836_226.cpp:5: error: expected `;' before "a"
0_0_12303836_226.cpp:6: error: expected `;' before "sum"
0_0_12303836_226.cpp:7: error: `sum' undeclared (first use this function)
0_0_12303836_226.cpp:7: error: `a' undeclared (first use this function)
0_0_12303836_226.cpp:7: error: `printf' undeclared (first use this function)