Main.cc: In function ‘int main()’:
Main.cc:4:5: error: ‘chara’ was not declared in this scope
chara[101];
^~~~~
Main.cc:4:5: note: suggested alternative: ‘char’
chara[101];
^~~~~
char
Main.cc:5:10: error: ‘a’ was not declared in this scope
cin>>a;
^