aligna

)classalignd{CharA ShortbDoublec;};#pragma pack ()voidTestsizeofalign () {cout"//////////Test memory alignment//////////"cout"Aligna:"sizeof(Aligna) cout"ALIGNB:"sizeof(ALIGNB) cout"ALIGNC:"sizeof(ALIGNC) cout"ALIGND:"sizeof(ALIGND) cout////////////testing polymorphic////////////classvirtuala{Virtual voidTest ();};classvirtualb{Virtual voidTest ();Virtual voidTest2 ();};voidVirtualb::test () {}voidVirtualb:

CSS Learning (21)-flexbox Model 2I. theory:1. flex-flowA. flex-direction: Set the scaling flow direction of the scaling containerB. flex-wrap: Set whether the scaling items in the scaling container are lined up with lines when the scaling container does not have enough space.2. flex-packA. parameters with the same attributes as box-packB. The distribute scaling project is evenly distributed in the same row.C. the starting edge of the first scaling project in the start scaling container is placed

is displayed along the block axis.8. layout orderA. box-direction1) normal display2) reverse display of reverse9. Scaling line feed box-lines1) All scaling items of a single scaling container are displayed in one row or column.2) multiple: specify multiple rows or columns of the scaling container to display the scaling project.10. Spindle alignment box-packA. The start scaling project is aligned with the start position of a row.B. The end scaling project is aligned with the end position of a ro

1. Code tagsPHP program can use 2. IndentPHP program indentation should be in accordance with the standard keyboard 1 "tab" key, that is, 4 spaces, a program should not appear in the two kinds of indentation rules3. LengthA) The valid code length for a single function should be within 100 lines, excluding comment lines.b). The valid code length for a single class should be within 1500 lines, excluding comment lines.4. Line widthThe line width for each line of PHP code is set to 80 characters.5.

First, the theory:1.flex-flowA.flex-direction setting the telescopic flow direction of the telescopic containerB.flex-wrap setting a scaling item in a telescopic container if there is not enough space in the telescopic container, whether the scaling item is wrapped in a telescopic container2.flex-packA. With the same parameters as the Box-pack propertyB.distribute scaling items are evenly distributed across the same lineThe starting edge of the first telescopic project in the C.start telescopic