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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 5Program ended with exit code: 0

 

 

从零开始学习Object-C---第二天