View Compilation Error

0_0_18940601_9951.cpp:3:11: error: '::main' must return 'int'
 void main()
           ^
0_0_18940601_9951.cpp: In function 'int main()':
0_0_18940601_9951.cpp:15:10: error: 'i' was not declared in this scope
    if((a[i]+b[i]>c[i])&&(a[i]-b[i]<c[i]))
          ^