View Compilation Error

0_0_20329291_11711.cpp: In function 'int main()':
0_0_20329291_11711.cpp:5:13: error: expected unqualified-id before 'int'
     int n,i,int sum;
             ^
0_0_20329291_11711.cpp:9:4: error: 'sum' was not declared in this scope
    sum=1;
    ^
0_0_20329291_11711.cpp:12:4: error: 'sum' was not declared in this scope
    sum=1;
    ^
0_0_20329291_11711.cpp:16:18: error: 'sum' was not declared in this scope
    printf("%d\n",sum);
                  ^