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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5. struct struct1
  6. {
  7.     vector<unsigned> vec1;
  8. };
  9.  
  10. int main() {
  11.  
  12. 	vector<struct1> vecStruct1;
  13.     struct1 obj1Struct1;
  14.     struct1 obj2Struct1;
  15.     vecStruct1.push_back(obj1Struct1);
  16.     vecStruct1.push_back(obj2Struct1);
  17.  
  18.     cout << "Before resizing the vector:" << endl;
  19.     cout << "Address of vecStruct1[0]:" << &vecStruct1[0] << endl;
  20.     cout << "Address of vecStruct1[1]:" << &vecStruct1[1] << endl;
  21.     cout << "Capacity of the vector in vecStruct1[0]:" << vecStruct1[0].vec1.capacity() << endl;
  22.     cout << "Capacity of the vector in vecStruct1[1]:" << vecStruct1[1].vec1.capacity() << endl;
  23.     cout << "Address of the 0th internal vector:" << &(vecStruct1[0].vec1[0]) << endl;
  24.     cout << "Address of the 1st internal vector:" << &(vecStruct1[1].vec1[0]) << endl;
  25.     cout << endl;
  26.  
  27.  
  28.     vecStruct1[0].vec1.resize(1000);
  29.  
  30.     cout << "After resizing vecStruct1[0]:" << endl;
  31.     cout << "Address of vecStruct1[0]:" << &vecStruct1[0] << endl;
  32.     cout << "Address of vecStruct1[1]:" << &vecStruct1[1] << endl;
  33.     cout << "Capacity of the vector in vecStruct1[0]:" << vecStruct1[0].vec1.capacity() << endl;
  34.     cout << "Capacity of the vector in vecStruct1[1]:" << vecStruct1[1].vec1.capacity() << endl;
  35.     cout << "Address of the 0th internal vector:" << &(vecStruct1[0].vec1[0]) << endl;
  36.     cout << "Address of the 1st internal vector:" << &(vecStruct1[1].vec1[0]) << endl;
  37.     cout << endl;
  38.  
  39.  
  40.     vecStruct1[1].vec1.resize(2000);
  41.  
  42.     cout << "After resizing vecStruct1[1]:" << endl;
  43.     cout << "Address of vecStruct1[0]:" << &vecStruct1[0] << endl;
  44.     cout << "Address of vecStruct1[1]:" << &vecStruct1[1] << endl;
  45.     cout << "Capacity of the vector in vecStruct1[0]:" << vecStruct1[0].vec1.capacity() << endl;
  46.     cout << "Capacity of the vector in vecStruct1[1]:" << vecStruct1[1].vec1.capacity() << endl;
  47.     cout << "Address of the 0th internal vector:" << &(vecStruct1[0].vec1[0]) << endl;
  48.     cout << "Address of the 1st internal vector:" << &(vecStruct1[1].vec1[0]) << endl;
  49.     cout << endl;
  50.  
  51. 	return 0;
  52. }
Success #stdin #stdout 0s 3232KB
comments (?)
stdin 
Standard input is empty
stdout 
Before resizing the vector:
Address of vecStruct1[0]:0x98fc018
Address of vecStruct1[1]:0x98fc024
Capacity of the vector in vecStruct1[0]:0
Capacity of the vector in vecStruct1[1]:0
Address of the 0th internal vector:0
Address of the 1st internal vector:0

After resizing vecStruct1[0]:
Address of vecStruct1[0]:0x98fc018
Address of vecStruct1[1]:0x98fc024
Capacity of the vector in vecStruct1[0]:1000
Capacity of the vector in vecStruct1[1]:0
Address of the 0th internal vector:0x98fc038
Address of the 1st internal vector:0

After resizing vecStruct1[1]:
Address of vecStruct1[0]:0x98fc018
Address of vecStruct1[1]:0x98fc024
Capacity of the vector in vecStruct1[0]:1000
Capacity of the vector in vecStruct1[1]:2000
Address of the 0th internal vector:0x98fc038
Address of the 1st internal vector:0x98fcfe0
https://ideone.com/JVaiqg
language:
C++14 (gcc 8.3)
created:
8 years ago
visibility:
public

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