从零开始学习Object-C---第二天

一段代码开始新的学习

//
//  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;

　　定义整形的变量，object-c中常见数据类型如下：

　　1.1 整型 int integerType = 1;

　　1.2 浮点型 float floatType = 3.14;

　　1.3 双浮点型 double doubleType = 3.1415;

　　1.4 短整型 short int shortType = 50;

　　1.5 长整型 long long int longlongType = 123456789L;

2.quotient = numertor/denominator;

　　变量相除（numertor/denominator）然后将得到的值赋给商（quotient）

3.NSLog(@"The fraction is %i/%i \nthe quotient is %i", numertor, denominator, quotient);

　　NSLog中%i的使用方法与C语言中相同，即只要在NSLog的例程中发现%i字符，会自动用例程中的对应变量替换显示。\n为换行符。

程序运行结果如下：

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