View Compilation Error

0_0_18779948_6421.cpp: In function 'void DP(int, int)':
0_0_18779948_6421.cpp:40:6: error: 'i' was not declared in this scope
  for(i=2;i<=N;i++){
      ^
0_0_18779948_6421.cpp:41:7: error: 'j' was not declared in this scope
   for(j=2;j<=M;j++){
       ^
0_0_18779948_6421.cpp: In function 'double caseinput_test()':
0_0_18779948_6421.cpp:102:6: error: 'i' was not declared in this scope
  for(i=1;i<=N;i++){
      ^