View Compilation Error

0_0_32768355_5248.cpp: In function 'int main()':
0_0_32768355_5248.cpp:54:3: error: expected ',' or ';' before 'int'
   int sum=0,pre=0;
   ^
0_0_32768355_5248.cpp:57:4: error: 'sum' was not declared in this scope
    sum=0;
    ^
0_0_32768355_5248.cpp:74:9: error: 'pre' was not declared in this scope
    sum+=pre;
         ^