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  1. #include <iostream>
  2. #include <vector>
  3. using namespace std;
  4.  
  5.  
  6. template<class T> vector<T> * addition_of_vectors(vector<T>& first_vector,
  7.     	vector<T>& second_vector) {
  8. 	vector<T> *addition_result_vector = 0; // = NULL; or = nullptr; depends on using c++ standart
  9. 	if (first_vector.size() == second_vector.size()) {
  10. 		addition_result_vector = new vector<T>(first_vector.size());
  11. 		for (int i = 0; i < first_vector.size(); ++i) {
  12. 			(*addition_result_vector)[i] = first_vector[i] + second_vector[i];
  13. 		}
  14. 	} else {
  15. 		cout << "The sizes of vectors aren't equal!";
  16. 	}
  17. 	return addition_result_vector;
  18. }
  19.  
  20.  
  21. int main() {
  22.    cout << "Test of template function " << endl; 
  23.  
  24.    cout << "Creating first integer vector " << endl; 
  25.     std::vector<int> first_integer_vector;
  26. 	first_integer_vector.push_back(5);
  27. 	first_integer_vector.push_back(20);
  28.     cout << "First integer vector created" << endl;
  29.  
  30.     cout << "Creating second integer vector " << endl; 
  31.     std::vector<int> second_integer_vector;
  32. 	second_integer_vector.push_back(11);
  33. 	second_integer_vector.push_back(3);
  34.     cout << "Second integer vector created" << endl;
  35.  
  36.     cout << "Calling function \"addition_of_vectors\"";
  37.     std::vector<int> *pointer_to_addition_result_vector = addition_of_vectors(
  38. 			first_integer_vector, second_integer_vector);
  39.     cout << "Function called";
  40.  
  41.  
  42.     if (pointer_to_addition_result_vector) { 	//Only if function returned some address
  43. 		cout << "Result vector pointer : " << pointer_to_addition_result_vector
  44. 				<< endl;
  45. 		for (int i = 0; i < (*pointer_to_addition_result_vector).size(); ++i) {
  46.  
  47. 			cout << "result[" << i << "] = "
  48. 					<< (*pointer_to_addition_result_vector)[i] << endl;
  49. 		}
  50. 		delete pointer_to_addition_result_vector; // prevent memory leaks
  51. 		pointer_to_addition_result_vector = 0; // prevent usage of pointer with invalid address
  52. 	} else {
  53.         cout << "Error : pointer to addition result vector is null";   
  54. 	}
  55.    cout << "Test finished" << endl;
  56.    return 0;
  57. }
Success #stdin #stdout 0s 3476KB
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stdin
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Standard input is empty
stdout
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Test of template function 
Creating first integer vector 
First integer vector created
Creating second integer vector 
Second integer vector created
Calling function "addition_of_vectors"Function calledResult vector pointer : 0x8f7d008
result[0] = 16
result[1] = 23
Test finished
https://ideone.com/8E1ieM
language:
C++14 (gcc 8.3)
created:
10 years ago
visibility:
public

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