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#include <iostream>
using namespace std;
 
int main() {
cout<<"Hello World!";
{
cout<<"Hello";
cout<<"World";
{
cout<<"Hello\n";
cout<<"World";
{
int a=3;
float b=1.2;
char anne='a';
cout<<a<<endl;
cout<<b<<endl;
cout<<anne;
{
int a=5,b=3,sum;
cout<<a<<endl;
cout<<b<<endl;
sum=a+b;
cout<<"The sum is"<<sum;
}

prog.cpp: In function ‘int main()’:
prog.cpp:25:1: error: expected ‘}’ at end of input
 }
 ^
prog.cpp:12:1: note: to match this ‘{’
 {
 ^
prog.cpp:25:1: error: expected ‘}’ at end of input
 }
 ^
prog.cpp:9:1: note: to match this ‘{’
 {
 ^
prog.cpp:25:1: error: expected ‘}’ at end of input
 }
 ^
prog.cpp:6:1: note: to match this ‘{’
 {
 ^
prog.cpp:25:1: error: expected ‘}’ at end of input
 }
 ^
prog.cpp:4:12: note: to match this ‘{’
 int main() {
            ^

Standard output is empty