View Compilation Error

0_0_21752987_29575.cpp: In function 'int main()':
0_0_21752987_29575.cpp:37:17: error: 'sumr' was not declared in this scope
                 sumr+=a[i].val;
                 ^
0_0_21752987_29575.cpp:39:17: error: 'suml' was not declared in this scope
                 suml+=a[i].val;
                 ^
0_0_21752987_29575.cpp:40:13: error: 'suml' was not declared in this scope
         ans=suml*sumr;
             ^
0_0_21752987_29575.cpp:40:18: error: 'sumr' was not declared in this scope
         ans=suml*sumr;
                  ^