GCOV

https://codeflu.blog/2015/01/16/finally-integrating-gcov-and-lcov-tool-into-cppagent-build-process/

$g++ -o menu.out --coverage menu.cpp

$lcov -t "result" -o ex_test.info -c -d .

$genhtml -o res ex_test.info

#include <iostream>
       2             : using namespace std;
       3             : 
       4             : void showChoices();
       5             : float add(float, float);
       6             : float subtract(float, float);
       7             : float multiply(float, float);
       8             : float divide(float, float);
       9             : 
      10           2 : int main()
      11             : {
      12             :         float x, y;
      13             :         int choice;
      14           2 :         do
      15             :         {
      16           2 :                 showChoices();
      17           2 :                 cin >> choice;
      18           2 :                 switch (choice)
      19             :                 {
      20             :                 case 1:
      21           0 :                         cout << "Enter two numbers: ";
      22           0 :                         cin >> x >> y;
      23           0 :                         cout << "Sum " << add(x,y) <<endl;
      24           0 :                         break;
      25             :                 case 2:
      26           0 :                         cout << "Enter two numbers: ";
      27           0 :                         cin >> x >> y;
      28           0 :                         cout << "Difference " << subtract(x,y) <<endl;
      29           0 :                         break;
      30             :                 case 3:
      31           0 :                         cout << "Enter two numbers: ";
      32           0 :                         cin >> x >> y;
      33           0 :                         cout << "Product " << multiply(x,y) <<endl;
      34           0 :                         break;
      35             :                 case 4:
      36           1 :                         cout << "Enter two numbers: ";
      37           1 :                         cin >> x >> y;
      38           1 :                         cout << "Quotient " << divide(x,y) <<endl;
      39           1 :                         break;
      40             :                 case 5:
      41           1 :                         break;
      42             :                 default:
      43           0 :                         cout << "Invalid input" << endl;
      44             :                 }
      45           2 :         }while (choice != 5);
      46             : 
      47           1 :         return 0;
      48             : }
      49             : 
      50           2 : void showChoices()
      51             : {
      52           2 :         cout << "MENU" << endl;
      53           2 :         cout << "1: Add " << endl;
      54           2 :         cout << "2: Subtract" << endl;
      55           2 :         cout << "3: Multiply " << endl;
      56           2 :         cout << "4: Divide " << endl;
      57           2 :         cout << "5: Exit " << endl;
      58           2 :         cout << "Enter your choice :";
      59           2 : }
      60             : 
      61           0 : float add(float a, float b)
      62             : {
      63           0 :         return a+b;
      64             : }
      65             : 
      66           0 : float subtract(float a, float b)
      67             : {
      68           0 :         return a-b;
      69             : }
      70             : 
      71           0 : float multiply(float a, float b)
      72             : {
      73           0 :         return a*b;
      74             : }
      75             : 
      76           1 : float divide(float a, float b)
      77             : {
      78           1 :         return a/b;
      79           3 : }