View Compilation Error

1_858_231_7531.cpp:2:13: error: expected unqualified-id before 'for'
             for(int i = 0; i < a.size(); ++i){
             ^
1_858_231_7531.cpp:2:28: error: 'i' does not name a type
             for(int i = 0; i < a.size(); ++i){
                            ^
1_858_231_7531.cpp:2:42: error: expected unqualified-id before '++' token
             for(int i = 0; i < a.size(); ++i){
                                          ^
1_858_231_7531.cpp:6:13: error: expected unqualified-id before 'for'
             for(int i = 0; i < 26; ++i){
             ^
1_858_231_7531.cpp:6:28: error: 'i' does not name a type
             for(int i = 0; i < 26; ++i){
                            ^
1_858_231_7531.cpp:6:36: error: expected unqualified-id before '++' token
             for(int i = 0; i < 26; ++i){
                                    ^