View Compilation Error

0_0_38880203_32546.cpp: In function 'int main()':
0_0_38880203_32546.cpp:12:25: error: 'sum' was not declared in this scope
   12 |                         sum=0;
      |                         ^~~
0_0_38880203_32546.cpp:18:25: error: 'sum' was not declared in this scope
   18 |                         sum=0;
      |                         ^~~