View Compilation Error

0_0_32868476_2792.cpp:1:9: error: expected constructor, destructor, or type conversion before '(' token
     sort(lowp,lowp+cl);
         ^
0_0_32868476_2792.cpp:2:5: error: 'n' does not name a type
     n = 0;
     ^
0_0_32868476_2792.cpp:4:5: error: expected unqualified-id before 'for'
     for(int i = 0,j; i < cl; i = j) {
     ^
0_0_32868476_2792.cpp:4:22: error: 'i' does not name a type
     for(int i = 0,j; i < cl; i = j) {
                      ^
0_0_32868476_2792.cpp:4:30: error: 'i' does not name a type
     for(int i = 0,j; i < cl; i = j) {
                              ^
0_0_32868476_2792.cpp:10:5: error: 'cl' does not name a type
     cl = n;//https://blog.csdn.net/miku23736748/article/details/52039847
     ^