iOS Learning Day3xiawu

Switch

#include <stdio.h>intMainintargcChar*argv[]) {    inti; scanf ("%d",&i); Switch(i) { Case 1: {printf ("Spring");  Break; }         Case 2: {printf ("Xia");  Break; }         Case 3: {printf ("Autumn");  Break; }                     Case 4: {printf ("Winter"); }        default:             Break; }}

Multiple case can run a block of statements

The definition variable in case needs to be added {};

Enum type (enum)

1

Improve the readability of the program, the essence is shaping, with enumeration type to represent integer constants;

enum season{
Spring
Summer
Autumn
Winter
}
Start from zero by default
Enum Season aeason=0;
scanf ("%d,&season");
Switch (season)
{
Case Spring:
{
printf ("Spring");
}
Case Summer:

{
printf ("Spring");
}
Case Autumn:
{
printf ("Autumn");
]

}

#include <stdio.h>enumseason{Spring=1, summer, autumn, Winter};typedefenumSeason Myseason;//Create an alias for an existing typeintMainintargcChar*argv[]) {        //start from zero by defaultMyseason season=0; scanf ("%d",&season); Switch(season) { CaseSpring: {printf ("Spring");  Break; }         CaseSummer: {printf ("Summer");  Break; }         CaseAutumn: {printf ("Autumn");  Break; }             CaseWinter: {printf ("Winter");  Break; }            default: {printf ("Unknown"); }            }}