在数组中添加一个元素 数组顺序依旧正常排序

#import <Foundation/Foundation.h>
int main(int argc, const charchar * argv[]) {
    @autoreleasepool {
        //原始数组
        NSMutableArray *originalarray = [NSMutableArray arrayWithArray:@[@1, @3, @5, @7, @9]];
        int inputnumber;

        scanf("%d",&inputnumber);


        for (int i=0; i<originalarray.count; i++) {
            if ([[NSNumber numberWithInt:inputnumber]compare:originalarray[i]]<0) {
                [originalarray insertObject:[NSNumber numberWithInt:inputnumber] atIndex:i];
                break;
            }

            if (i==originalarray.count) {
                [originalarray insertObject:[NSNumber numberWithInt:inputnumber] atIndex:originalarray.count];
            }
        }
        NSLog(@"%@",originalarray);  //打印
    }
    return 0;
}