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  1. /*
  2. created by Rian Adam Rajagede
  3. 31 July 2020
  4. */
  5.  
  6. #include <iostream>
  7. #include <vector>
  8. using namespace std;
  9.  
  10. int main() {
  11. 	cout << "=====================Section A======================" << endl;
  12. 	cout << "====================================================" << endl;
  13.  
  14. 	// vector of int
  15. 	vector<int> v;
  16. 	cout << "Initial vector size:" << v.size() << endl; // vector is empty
  17.  
  18. 	v.push_back(3);
  19. 	v.push_back(1);
  20. 	v.push_back(7);
  21. 	cout << "New vector size:" << v.size() << endl; // vector size is 3 [3, 1, 7]
  22. 	cout << "v[0]:" << v[0] << endl;
  23. 	cout << "v[1]:" << v[1] << endl;
  24. 	cout << "v[2]:" << v[2] << endl;
  25. 	cout << "front:" << v.front() << endl;
  26. 	cout << "back:" << v.back() << endl;
  27.  
  28. 	cout << "=====================Section B======================" << endl;
  29. 	cout << "====================================================" << endl;
  30.  
  31. 	vector<int> v2;
  32. 	cout << "Initial vector size:" << v2.size() << endl; // vector is empty
  33. 	v2.assign(100,2);
  34. 	cout << "New vector size:" << v2.size() << endl; // vector size is 100 
  35. 	cout << "v[0]:" << v2[0] << endl;
  36. 	cout << "v[1]:" << v2[1] << endl;
  37. 	cout << "v[2]:" << v2[2] << endl;
  38. 	cout << "front:" << v2.front() << endl;
  39. 	cout << "back:" << v2.back() << endl;
  40.  
  41. 	cout << "=====================Section C======================" << endl;
  42. 	cout << "====================================================" << endl;
  43.  
  44. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  45.  
  46. 	v.insert(v.begin(), 2); // insert in the first position
  47. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  48.  
  49. 	v.insert(v.begin()+1, 8); // insert in the first position+1
  50. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  51.  
  52. 	v.insert(v.end(), 0); // insert in the last position
  53. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  54.  
  55. 	v.insert(v.end()-1, 6); // insert in the last position-1
  56. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  57.  
  58. 	cout << "=====================Section D======================" << endl;
  59. 	cout << "====================================================" << endl;
  60.  
  61. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  62.  
  63. 	v.erase(v.begin()+2); // delete 1 elements in position 2
  64. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  65.  
  66. 	v.erase(v.begin()+1, v.begin()+4); // delete 3 elementa, position 1, 2, and 3
  67. 	for(int i=0;i<v.size();i++) cout << v[i] << " "; cout << endl; // print elements of v
  68.  
  69. 	cout << "=====================Section E======================" << endl;
  70. 	cout << "====================================================" << endl;
  71.  
  72. 	v.clear();
  73. 	cout << "Size after cleared:" << v.size() << endl;
  74.  
  75. 	return 0;
  76. }
Success #stdin #stdout 0s 4468KB
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stdin
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Standard input is empty
stdout
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=====================Section A======================
====================================================
Initial vector size:0
New vector size:3
v[0]:3
v[1]:1
v[2]:7
front:3
back:7
=====================Section B======================
====================================================
Initial vector size:0
New vector size:100
v[0]:2
v[1]:2
v[2]:2
front:2
back:2
=====================Section C======================
====================================================
3 1 7 
2 3 1 7 
2 8 3 1 7 
2 8 3 1 7 0 
2 8 3 1 7 6 0 
=====================Section D======================
====================================================
2 8 3 1 7 6 0 
2 8 1 7 6 0 
2 6 0 
=====================Section E======================
====================================================
Size after cleared:0
https://ideone.com/vqSzoh
Tutorial Vector
language:
C++14 (gcc 8.3)
created:
3 years ago
visibility:
secret

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