View Compilation Error

0_0_10859315_7226.cpp:5:7: invalid suffix "using" on integer constant
0_0_10859315_7226.cpp:5: error: expected `]' before "namespace"
0_0_10859315_7226.cpp:5: error: expected `,' or `;' before "namespace"
0_0_10859315_7226.cpp:5: error: expected unqualified-id before ']' token
0_0_10859315_7226.cpp:5: error: expected `,' or `;' before ']' token
0_0_10859315_7226.cpp: In function `int main()':
0_0_10859315_7226.cpp:9: error: `a' undeclared (first use this function)
0_0_10859315_7226.cpp:9: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_10859315_7226.cpp:10: error: `sort' undeclared (first use this function)
0_0_10859315_7226.cpp:11: error: `max' undeclared (first use this function)