View Compilation Error

0_0_28004389_20072.cpp: In function 'int main()':
0_0_28004389_20072.cpp:23:13: error: expected ')' before ';' token
   if(int i=3;i<m/2;i+=2)
             ^
0_0_28004389_20072.cpp:23:14: error: 'i' was not declared in this scope
   if(int i=3;i<m/2;i+=2)
              ^