View Compilation Error

0_0_28702876_21112.cpp:2:11: error: '::main' must return 'int'
 void main(){
           ^
0_0_28702876_21112.cpp: In function 'int main()':
0_0_28702876_21112.cpp:5:17: error: expected ';' before ')' token
 for(i=1,i<=a,i++)
                 ^
0_0_28702876_21112.cpp:7:1: error: expected primary-expression before '}' token
 }
 ^
0_0_28702876_21112.cpp:7:1: error: expected ';' before '}' token
0_0_28702876_21112.cpp:7:1: error: expected primary-expression before '}' token
0_0_28702876_21112.cpp:7:1: error: expected ')' before '}' token
0_0_28702876_21112.cpp:7:1: error: expected primary-expression before '}' token