C++超详细讲解逗号操作符

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#include <iostream>

usingnamespacestd;

voidfunc(inti)

{

cout <<"func(): i = "<< i << endl;

}

intmain()

{

inta[3][3] = {

(0, 1, 2),

(3, 4, 5),

(6, 7, 8)

};

inti = 0;

intj = 0;

while(i < 5)

func(i),

i++;

for(i = 0; i < 3; i++)

{

for(j = 0; j < 3; j++)

{

cout << a[i][j] << endl;

}

}

(i, j) = 6;

cout <<"i = "<< i << endl;

cout <<"j = "<< j << endl;

return0;

}

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inta[3][3] = {

{0, 1, 2},

{3, 4, 5},

{6, 7, 8}

};

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while(i < 5)

func(i),

i++;

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while(i < 5)

{

func(i);

i++;

}

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#include <iostream>

usingnamespacestd;

classTest

{

intmValue;

public:

Test(inti)

{

mValue = i;

}

intvalue()

{

returnmValue;

}

};

Test& operator , (constTest& a,constTest& b)

{

returnconst_cast<Test&>(b);

}

Test func(Test& i)

{

cout <<"func(): i = "<< i.value() << endl;

returni;

}

intmain()

{

Test t0(0);

Test t1(1);

Test tt = (func(t0), func(t1));

cout << tt.value() << endl;

return0;

}

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Test tt = (func(t0), func(t1));

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Test tt = (operator , (func(t0), func(t1)));

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Test& operator , (constTest& a,constTest& b)

{

returnconst_cast<Test&>(b);

}