View Compilation Error

0_0_16167727_16989.cpp: In function 'void init_prim()':
0_0_16167727_16989.cpp:7:9: error: 'i' was not declared in this scope
     for(i=0;i<3000005;i++)
         ^
0_0_16167727_16989.cpp:8:1: error: 'vis' was not declared in this scope
 vis[i]=0;
 ^