Main.cc: In function 'int main()': Main.cc:4:16: error: 'n' was not declared in this scope int a[101];n,m,s; ^ Main.cc:4:18: error: 'm' was not declared in this scope int a[101];n,m,s; ^ Main.cc:4:20: error: 's' was not declared in this scope int a[101];n,m,s; ^