Main.cc: In function 'int main()': Main.cc:10:6: error: conflicting declaration 'int b' int b=0; ^ Main.cc:6:11: note: previous declaration as 'int b [n]' int a[n],b[n]; ^ Main.cc:12:4: error: incompatible types in assignment of 'int*' to 'int [n]' b=b+a[i]; ^ Main.cc:14:10: error: invalid operands of types 'int [n]' and 'int' to binary 'operator*' cout<