View Compilation Error

0_0_11170753_10631.cpp:10: error: expected constructor, destructor, or type conversion before "long"
0_0_11170753_10631.cpp:10: error: expected `,' or `;' before "long"
0_0_11170753_10631.cpp: In function `void regroup(int)':
0_0_11170753_10631.cpp:31: error: `sed' undeclared (first use this function)
0_0_11170753_10631.cpp:31: error: (Each undeclared identifier is reported only once for each function it appears in.)