View Compilation Error

0_0_18704326_30012.cpp:5:1: error: stray '\' in program
 printf(%d\n,sum)
 ^
0_0_18704326_30012.cpp:3:1: error: expected initializer before 'int'
 int(a,b,sum);
 ^
0_0_18704326_30012.cpp:4:1: error: 'sum' does not name a type
 sum==a+b
 ^