View Compilation Error

0_0_24360871_30571.cpp: In function 'void swap_(int*)':
0_0_24360871_30571.cpp:15:6: error: 'i' was not declared in this scope
    m=i;
      ^
0_0_24360871_30571.cpp: At global scope:
0_0_24360871_30571.cpp:21:2: error: expected unqualified-id before 'for'
  for(int i=0;i<n;i++){
  ^
0_0_24360871_30571.cpp:21:14: error: 'i' does not name a type
  for(int i=0;i<n;i++){
              ^
0_0_24360871_30571.cpp:21:18: error: 'i' does not name a type
  for(int i=0;i<n;i++){
                  ^
0_0_24360871_30571.cpp:25:2: error: expected declaration before '}' token
  }
  ^