Learning Object-C from scratch --- the next day

Start learning with a piece of code

////  main.m//  Demo1////  Created by lee on 14/10/27.//  Copyright (c) 2014年 lee. All rights reserved.//#import <Foundation/Foundation.h>int main(int argc, const char * argv[]) {    @autoreleasepool {        int quotient, numertor, denominator;        numertor = 10;        denominator = 2;        quotient = numertor/denominator;        NSLog(@"The fraction is %i/%i \nthe quotient is %i", numertor, denominator, quotient);    }    return 0;}

1. Int quotient, numertor, denominator;

Defines Integer Variables. Common Data Types in object-C are as follows:

1.1 integer int integertype = 1;

1.2 float floattype = 3.14;

1.3Double Floating PointDouble doubletype = 3.1415;

1.4 short integer short int partition type = 50;

1.5 long integerLong long int longlongtype = 123456789l;

2.Quotient = numertor/denominator;

division of variables (> numertor/denominator) and then assign the obtained value to the supplier ( quotient)

3.Nslog (@ "the fraction is % I/% I \ nthe quotient is % I", numertor, denominator, quotient );

The usage of % I in nslog is the same as that in C language, that is, as long as the % I character is found in the nslog routine, it will be automatically replaced with the corresponding variable in the routine. \ N is a line break.

The program running result is as follows:

2014-10-27 21:30:48.556 Demo1[1521:67965] The fraction is 10/2 the quotient is 5Program ended with exit code: 0

 

 

Learning Object-C from scratch --- the next day