View Compilation Error

0_0_30988917_3809.cpp:4:7: error: 't' does not name a type
 int m;t++)
       ^
0_0_30988917_3809.cpp:10:3: error: 'len' does not name a type
   len[i]=sqrt((a[i][0]-a[i][1])*(a[i][0]-a[i][1])+(a[i][2]-a[i][3])*(a[i][2]-a[i][3]));
   ^
0_0_30988917_3809.cpp:12:2: error: expected declaration before '}' token
  }
  ^