View Compilation Error

0_0_32862227_25498.cpp:1:1: error: 'M' does not name a type
 M[n]=for(int i=0;i<=floor(n/2);++i){
 ^
0_0_32862227_25498.cpp:1:18: error: 'i' does not name a type
 M[n]=for(int i=0;i<=floor(n/2);++i){
                  ^
0_0_32862227_25498.cpp:1:32: error: expected unqualified-id before '++' token
 M[n]=for(int i=0;i<=floor(n/2);++i){
                                ^