Main.cc: In function 'int main()': Main.cc:6:6: error: conflicting declaration 'int a' int a,max=0; ^ Main.cc:5:6: note: previous declaration as 'int a [10]' int a[10]={}; ^ Main.cc:16:5: error: incompatible types in assignment of 'int' to 'int [10]' a=i; ^