Main.cc: In function 'int main()': Main.cc:12:11: error: expected primary-expression before ';' token cout<<; ^ Main.cc:8:14: warning: unused variable 'k' [-Wunused-variable] int n,m=1,k,j,i; ^ Main.cc:8:16: warning: unused variable 'j' [-Wunused-variable] int n,m=1,k,j,i; ^ Main.cc:8:18: warning: unused variable 'i' [-Wunused-variable] int n,m=1,k,j,i; ^ Main.cc:10:5: warning: unused variable 'a' [-Wunused-variable] int a[n][n]; ^