Student Sort Questions

Create student class name study number age score

Create five student objects, add arrays, sort by name ascending number descending ascending grade descending order

Main.m

1 #import<Foundation/Foundation.h>2 #import "Student.h"3 intMainintargcConst Char*argv[]) {4 @autoreleasepool {5         //arc4random ()%10 0---96         //7Student * S1 = [[Student alloc] Initwithname:@"Jack"Stuid:arc4random ()%Ten+1Age:arc4random ()%Ten+1Andscore:arc4random ()% A+ -];8         //60-1009         TenStudent * s2 = [[Student alloc] Initwithname:@"Tom"Stuid:arc4random ()%Ten+1Age:arc4random ()%Ten+1Andscore:arc4random ()% A+ -]; One          AStudent * s3 = [[Student alloc] Initwithname:@"Lily"Stuid:arc4random ()%Ten+1Age:arc4random ()%Ten+1Andscore:arc4random ()% A+ -]; -          -Student * S4 = [[Student alloc] Initwithname:@"Lucy"Stuid:arc4random ()%Ten+1Age:arc4random ()%Ten+1Andscore:arc4random ()% A+ -]; theStudent * S5 = [[Student alloc] Initwithname:@"Mark"Stuid:arc4random ()%Ten+1Age:arc4random ()%Ten+1Andscore:arc4random ()% A+ -]; -          - //Nsarray * arr = @[s1,s2,s3,s4,s5]; -Nsmutablearray * arr =[Nsmutablearray array]; + [arr addobject:s1]; - [arr addobject:s2]; + [arr ADDOBJECT:S3]; A [arr ADDOBJECT:S4]; at [arr addobject:s5]; -         //Grades Descending -          for(inti =0; i< [arr Count]; i++) { -              for(intj =0; J < [arr Count]-i-1; J + +) { -Student * S1 =Arr[j]; -Student * s2 = arr[j+1]; in                 if([S1 isstuscorelessthananother:s2]) { -[Arr exchangeobjectatindex:j withobjectatindex:j+1]; to                 } +             } -         } theNSLog (@"%@", arr); *          $Nsarray * arr1 =[arr sortedarrayusingselector: @selector (isstuscorelessthananother:)];Panax NotoginsengNSLog (@"%@", arr1); -          the         //age left < right +          ANsarray * arr2 = [arr sortedarrayusingcomparator:^nscomparisonresult (Student * S1, Student *S2) { the             return[S1 Age] >[S2 age]; +         }]; -          $NSLog (@"%@", arr2); $          -          -Nsarray * ARR3 = [arr sortedarrayusingcomparator:^nscomparisonresult (Student * obj1, Student *obj2) { the             return[Obj1 Age] >[obj2 age]; -         }];WuyiNSLog (@"%@", ARR3); the          -Nsarray * ARR4 = [arr sortedarrayusingcomparator:^nscomparisonresult (Student * obj1, Student *obj2) { Wu             return[Obj1 score] <[OBJ2 score]; -         }]; AboutNSLog (@"%@", ARR4); $  -          -     } -     return 0; A}

main.m

1 #import<Foundation/Foundation.h>2 3 @interfaceStudent:nsobject {4NSString *_name;5     int_stuid;6     int_age;7     int_score;8 }9- (ID) Initwithname: (NSString *) name Stuid: (int) Stuid Age: (int) Age Andscore: (int) score;Ten  One- (int) score; A- (int) age; --(BOOL) Isstuscorelessthananother: (Student *) S2; - @end

Student.h

1 #import "Student.h"2 3 @implementationStudent4- (ID) Initwithname: (NSString *) name Stuid: (int) Stuid Age: (int) Age Andscore: (int) score {5     if(self =[Super Init]) {6_name =name;7_age =Age ;8_stuid =Stuid;9_score =score;Ten     } One     returnSelf ; A } -  -- (int) score { the     return_score; - } -  --(NSString *) Description { +     return[NSString stringWithFormat:@"name:%@ stuid:%d age:%d score:%d", _name,_stuid,_age,_score]; - } +  A- (int) Age { at     return_age; - } -  --(BOOL) Isstuscorelessthananother: (Student *) s2 { -     return[Self score] <[S2 score]; - } in  -  to @end

STUDENT.M

Student Sort Questions