#include <iostream>

#include <gmock/gmock.h>
#include <gtest/gtest.h>
using namespace std;

using MockProvider = testing::MockFunction<int(int&)>
int main() 
{
    MockProvider provider;
    const auto func = provider.asStdFunction();
    cout << "Hello, World!";
    return 0;
}

#include <algorithm>
#include <iterator>
#include <bitset>
#include <gmock/gmock.h>
#include <iostream>

using namespace ::testing;
using namespace std;

class myclass
{
    public:
    myclass(int _m, int _n) : m(_m), n(_n)
    {

    }
    myclass()
    {
        m = 520; 
        n = 200;
    }



    int m;
    int n;
};

class MockFather {
public:
virtual int foo(int& i){return 0;}
virtual void foo(double& d){};
virtual void foo(float& f){};
virtual int testfun(myclass* f){cout << "inside testfunc" << endl; return 1;}
};

class MockSon:public MockFather {
public:
MOCK_METHOD1(foo, int(int&));
MOCK_METHOD1(foo, void(double&));
MOCK_METHOD1(foo, void(float&));
MOCK_METHOD(int, testfun, (myclass*));
};

TEST(MockTest, Test)
{
    MockSon son; 
    myclass m(100, 300);
    myclass n, k;
    int myint;

    // EXPECT_CALL(son, foo(myint)).WillOnce(SetArgReferee<0>(10));
    cout << " Before " << endl;
    EXPECT_CALL(son, testfun(&n)).WillOnce(DoAll(SetArgPointee<0>(m), Return(1)));
    
    int a;
    // son.foo(a);
    cout << " After " << endl;
    int rtn = son.testfun(&k);
    
    std::cout << "A: " << myint << std::endl;
    std::cout << n.m << std::endl;
    std::cout << n.n << std::endl;
    // std::cout << "rtn " << rtn << std::endl;
}

int main(int argc, char** argv)
{
  ::testing::InitGoogleTest(&argc, argv);
  return RUN_ALL_TESTS();
}

C++ Online Compiler

Write, Run & Share C++ code online using OneCompiler's C++ online compiler for free. It's one of the robust, feature-rich online compilers for C++ language, running on the latest version 17. Getting started with the OneCompiler's C++ compiler is simple and pretty fast. The editor shows sample boilerplate code when you choose language as C++ and start coding!

Read inputs from stdin

OneCompiler's C++ online compiler supports stdin and users can give inputs to programs using the STDIN textbox under the I/O tab. Following is a sample program which takes name as input and print your name with hello.

#include <iostream>
#include <string>
using namespace std;

int main() 
{
    string name;
    cout << "Enter name:";
    getline (cin, name);
    cout << "Hello " << name;
    return 0;
}

About C++

C++ is a widely used middle-level programming language.

  • Supports different platforms like Windows, various Linux flavours, MacOS etc
  • C++ supports OOPS concepts like Inheritance, Polymorphism, Encapsulation and Abstraction.
  • Case-sensitive
  • C++ is a compiler based language
  • C++ supports structured programming language
  • C++ provides alot of inbuilt functions and also supports dynamic memory allocation.
  • Like C, C++ also allows you to play with memory using Pointers.

Syntax help

Loops

1. If-Else:

When ever you want to perform a set of operations based on a condition If-Else is used.

if(conditional-expression) {
   //code
}
else {
   //code
}

You can also use if-else for nested Ifs and If-Else-If ladder when multiple conditions are to be performed on a single variable.

2. Switch:

Switch is an alternative to If-Else-If ladder.

switch(conditional-expression){    
case value1:    
 // code    
 break;  // optional  
case value2:    
 // code    
 break;  // optional  
......    
    
default:     
 code to be executed when all the above cases are not matched;    
}

3. For:

For loop is used to iterate a set of statements based on a condition.

for(Initialization; Condition; Increment/decrement){  
  //code  
}

4. While:

While is also used to iterate a set of statements based on a condition. Usually while is preferred when number of iterations are not known in advance.

while (condition) {  
// code 
}

5. Do-While:

Do-while is also used to iterate a set of statements based on a condition. It is mostly used when you need to execute the statements atleast once.

do {  
 // code 
} while (condition);

Functions

Function is a sub-routine which contains set of statements. Usually functions are written when multiple calls are required to same set of statements which increases re-usuability and modularity. Function gets run only when it is called.

How to declare a Function:

return_type function_name(parameters);

How to call a Function:

function_name (parameters)

How to define a Function:

return_type function_name(parameters) {  
 // code
}