View Compilation Error

0_0_23551726_778.cpp: In function 'int main()':
0_0_23551726_778.cpp:44:3: error: 'num' was not declared in this scope
   num = 0;
   ^
0_0_23551726_778.cpp:46:9: error: 'value' was not declared in this scope
    cin>>value[i]>>weight[i]>>c[i];
         ^
0_0_23551726_778.cpp:46:19: error: 'weight' was not declared in this scope
    cin>>value[i]>>weight[i]>>c[i];
                   ^
0_0_23551726_778.cpp:69:20: error: 'value' was not declared in this scope
     for(int k=n;k>=value[i];k--){
                    ^
0_0_23551726_778.cpp:70:39: error: 'weight' was not declared in this scope
      dp[k] = max(dp[k],dp[k-value[i]]+weight[i]);
                                       ^