View Compilation Error

0_0_39638974_9352.cpp:2:5: error: cannot declare '::main' to be a global variable
    2 | int main{
      |     ^~~~
0_0_39638974_9352.cpp:3:1: error: expected primary-expression before 'int'
    3 | int a,b;
      | ^~~
0_0_39638974_9352.cpp:3:1: error: expected '}' before 'int'
0_0_39638974_9352.cpp:2:9: note: to match this '{'
    2 | int main{
      |         ^
0_0_39638974_9352.cpp:4:6: error: expected constructor, destructor, or type conversion before '(' token
    4 | scanf("%d %d,&a,&b");
      |      ^
0_0_39638974_9352.cpp:5:7: error: expected constructor, destructor, or type conversion before '(' token
    5 | printf("a+b的结果为%d\n",a+b);
      |       ^
0_0_39638974_9352.cpp:6:1: error: expected unqualified-id before 'return'
    6 | return 0;
      | ^~~~~~
0_0_39638974_9352.cpp:7:1: error: expected declaration before '}' token
    7 | }
      | ^