Question

PLease using C#

1. Without using try-catch-throw for exception handling (Ch07), display an error message (using csc or VS2017) when an input is invalid (i.e., no data, wrong format, wrong type, etc.) and fails the type conversion.
2. Generate random integers from any of the following three non-overlapped ranges

-14 ~ -7
-2 ~ 5
33 ~ 44

Numbers generated must also randomly distributed across the three ranges.

Answer 1

Exception handling

object o2 = null; 
try
 { 
int i2 = (int)o2; // Error 
} 

catch (InvalidCastException e) { } 

catch (ArgumentException e) when (e.ParamName == "…") { } 

catch (FileNotFoundException e) 
{ // FileNotFoundExceptions are handled here. 
} 
catch (IOException e) {  // Extract some information from this exception, and then // throw it to the parent method. 
 if (e.Source != null) 
Console.WriteLine("IOException source: {0}", e.Source);     
throw; 
} 

1. Generate random integers from any of the following three non-overlapped range

#include <bits/stdc++.h>
using namespace std;
void print_vector(vector<int> v){
cout << "[";
for(int i = 0; i<v.size(); i++){
cout << v[i] << ", ";
}
cout << "]"<<endl;
}
class Solution {
public:
vector <int> area;
vector < vector <int> > rect;
int sum;
Solution(vector<vector<int> >& rects) {
 rect = rects;
 sum = 0;
 for(int i =0 ; i < rects.size(); i++){
int x1 = rects[i][0];
int y1 = rects[i][1];
int x2 = rects[i][2];
int y2 = rects[i][3];
int temp = (abs(x2 - x1) + 1) * (abs(y2 - y1) + 1);
sum += temp;
area.push_back(sum);
 }
}
vector<int> pick() {
 int randArea = rand() % sum + 1;
int i;
 for(i = 0; i < area.size(); i++){
if(randArea <= area[i]) break;
 }
 int dist_x = rand() % (abs(rect[i][0] - rect[i][2] ) + 1);
 int dist_y = rand() % (abs(rect[i][1] - rect[i][3] ) + 1);
 return {dist_x + rect[i][0], dist_y + rect[i][1]};
}
};
main(){
vector<vector<int> > v = {{1, 1, 5, 5}};
Solution ob(v);
print_vector(ob.pick());
print_vector(ob.pick());
print_vector(ob.pick());
}

#include <bits/stdc++.h>
using namespace std;
void print_vector(vector<int> v){
cout << "[";
for(int i = 0; i<v.size(); i++){
cout << v[i] << ", ";
}
cout << "]"<<endl;
}
class Solution {
public:
vector <int> area;
vector < vector <int> > rect;
int sum;
Solution(vector<vector<int> >& rects) {
 rect = rects;
 sum = 0;
 for(int i =0 ; i < rects.size(); i++){
int x1 = rects[i][0];
int y1 = rects[i][1];
int x2 = rects[i][2];
int y2 = rects[i][3];
int temp = (abs(x2 - x1) + 1) * (abs(y2 - y1) + 1);
sum += temp;
area.push_back(sum);
 }
}
vector<int> pick() {
 int randArea = rand() % sum + 1;
int i;
 for(i = 0; i < area.size(); i++){
if(randArea <= area[i]) break;
 }
 int dist_x = rand() % (abs(rect[i][0] - rect[i][2] ) + 1);
 int dist_y = rand() % (abs(rect[i][1] - rect[i][3] ) + 1);
 return {dist_x + rect[i][0], dist_y + rect[i][1]};
}
};
main(){
vector<vector<int> > v = {{1, 1, 5, 5}};
Solution ob(v);
print_vector(ob.pick());
print_vector(ob.pick());
print_vector(ob.pick());
}

#include <bits/stdc++.h>
using namespace std;
void print_vector(vector<int> v){
cout << "[";
for(int i = 0; i<v.size(); i++){
cout << v[i] << ", ";
}
cout << "]"<<endl;
}
class Solution {
public:
vector <int> area;
vector < vector <int> > rect;
int sum;
Solution(vector<vector<int> >& rects) {
 rect = rects;
 sum = 0;
 for(int i =0 ; i < rects.size(); i++){
int x1 = rects[i][0];
int y1 = rects[i][1];
int x2 = rects[i][2];
int y2 = rects[i][3];
int temp = (abs(x2 - x1) + 1) * (abs(y2 - y1) + 1);
sum += temp;
area.push_back(sum);
 }
}
vector<int> pick() {
 int randArea = rand() % sum + 1;
int i;
 for(i = 0; i < area.size(); i++){
if(randArea <= area[i]) break;
 }
 int dist_x = rand() % (abs(rect[i][0] - rect[i][2] ) + 1);
 int dist_y = rand() % (abs(rect[i][1] - rect[i][3] ) + 1);
 return {dist_x + rect[i][0], dist_y + rect[i][1]};
}
};
main(){
vector<vector<int> > v = {{1, 1, 5, 5}};
Solution ob(v);
print_vector(ob.pick());
print_vector(ob.pick());
print_vector(ob.pick());
}

#include <bits/stdc++.h>
using namespace std;
void print_vector(vector<int> v){
cout << "[";
for(int i = 0; i<v.size(); i++){
cout << v[i] << ", ";
}
cout << "]"<<endl;
}
class Solution {
public:
vector <int> area;
vector < vector <int> > rect;
int sum;
Solution(vector<vector<int> >& rects) {
 rect = rects;
 sum = 0;
 for(int i =0 ; i < rects.size(); i++){
int x1 = rects[i][0];
int y1 = rects[i][1];
int x2 = rects[i][2];
int y2 = rects[i][3];
int temp = (abs(x2 - x1) + 1) * (abs(y2 - y1) + 1);
sum += temp;
area.push_back(sum);
 }
}
vector<int> pick() {
 int randArea = rand() % sum + 1;
int i;
 for(i = 0; i < area.size(); i++){
if(randArea <= area[i]) break;
 }
 int dist_x = rand() % (abs(rect[i][0] - rect[i][2] ) + 1);
 int dist_y = rand() % (abs(rect[i][1] - rect[i][3] ) + 1);
 return {dist_x + rect[i][0], dist_y + rect[i][1]};
}
};
main(){
vector<vector<int> > v = {{1, 1, 5, 5}};
Solution ob(v);
print_vector(ob.pick());
print_vector(ob.pick());
print_vector(ob.pick());
}