View Compilation Error

0_0_30698989_22215.cpp:6:10: error: expected constructor, destructor, or type conversion before '(' token
     scanf("%f%f%f\n",&a,&b,&c);
          ^
0_0_30698989_22215.cpp:7:5: error: expected unqualified-id before 'if'
     if(a+b>c&&a+c>b&&c+b>a)
     ^
0_0_30698989_22215.cpp:9:5: error: expected unqualified-id before 'else'
     else
     ^