OC中char/short/int/float/double在64位系统中所占字节数

yaoliangjun306

于 2017-03-31 21:39:28 发布

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        size_t charSize = sizeof(char);
        NSLog(@"charSize = %zu", charSize);
        
        size_t shortSize = sizeof(short);
        NSLog(@"shortSize = %zu", shortSize);
        
        size_t intSize = sizeof(int);
        NSLog(@"intSize = %zu", intSize);
        
        size_t floatSize = sizeof(float);
        NSLog(@"floatSize = %zu", floatSize);
        
        size_t doubleSize = sizeof(double);
        NSLog(@"doubleSize = %zu", doubleSize);

打印结果如下：

2017-03-31 21:37:47.747874 Sizeof[19698:1349743] charSize = 1
2017-03-31 21:37:47.748010 Sizeof[19698:1349743] shortSize = 2
2017-03-31 21:37:47.748022 Sizeof[19698:1349743] intSize = 4
2017-03-31 21:37:47.748031 Sizeof[19698:1349743] floatSize = 4
2017-03-31 21:37:47.748040 Sizeof[19698:1349743] doubleSize = 8