View Compilation Error

0_0_22375848_31717.cpp: In function 'int main()':
0_0_22375848_31717.cpp:5:1: error: expected initializer before 'a'
 a=1;
 ^
0_0_22375848_31717.cpp:6:1: error: 'b' was not declared in this scope
 b=1;
 ^
0_0_22375848_31717.cpp:7:1: error: 'sum' was not declared in this scope
 sum=a+b;
 ^
0_0_22375848_31717.cpp:8:8: error: unable to find string literal operator 'operator""sum'
 printf("sum is %d\n"sum);
        ^