foo.cc: In function 'int main()':
foo.cc:5:7: error: expected initializer before '+' token
    5 |  int a+1,b+1,c;
      |       ^
foo.cc:6:8: error: 'a' was not declared in this scope
    6 |  cout<<a<<" "<<b<<" ";
      |        ^
foo.cc:6:16: error: 'b' was not declared in this scope
    6 |  cout<<a<<" "<<b<<" ";
      |                ^
foo.cc:9:3: error: 'c' was not declared in this scope
    9 |   c=a+b;
      |   ^

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