09-self Example

/* Design a calculator class * sum * averaging */#import <foundation/foundation.h>//Tool class: Basically there is no member variable, the method is basically the class method @interface Jisusnqi: nsobject+ (int) SUMOFNUM1: (int) NUM1 andNum2: (int) num2;+ (int) AVERAGEOFNUM1: (int) NUM1 andNum2: (int) num2;@ End@implementation jisusnqi+ (int) SUMOFNUM1: (int) NUM1 andNum2: (int) num2{    return num1 + num2;} + (int) AVERAGEOFNUM1: (int) NUM1 andNum2: (int) num2{    //In this case, self represents the class    int sum = [Self sumofnum1:num1 andNum2: NUM2];    return SUM/2;} @endint Main () {    int a = [Jisusnqi averageofnum1:10 andnum2:12];       NSLog (@ "a=%d", a);    Jisusnqi *jsq = [Jisusnqi new];//   ////    [jsq sumofnum1:10 andnum2:13];       return 0;}

　　

09-self Example