View Compilation Error

0_0_20695332_29871.cpp: In function 'int maxsubsum(int, int, int*)':
0_0_20695332_29871.cpp:13:7: error: 'i' was not declared in this scope
  for( i=0;i<=m;i++){b[i][0]=0;}
       ^
0_0_20695332_29871.cpp:16:7: error: 'i' was not declared in this scope
  for( i=1;i<=m;i++)
       ^
0_0_20695332_29871.cpp:18:8: error: 'j' was not declared in this scope
   for( j=i;j<=n-m+i;j++)
        ^
0_0_20695332_29871.cpp:36:7: error: 'j' was not declared in this scope
  for( j=m;j<=n;j++)
       ^
0_0_20695332_29871.cpp: At global scope:
0_0_20695332_29871.cpp:44:11: error: '::main' must return 'int'
 void main()
           ^
0_0_20695332_29871.cpp: In function 'int main()':
0_0_20695332_29871.cpp:55:2: error: return-statement with no value, in function returning 'int' [-fpermissive]
  return ;
  ^