mac os 代码示例二

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[])
{

    @autoreleasepool {
        
        // insert code here...
        //NSLog(@"Hello, World!");
        //NSLog(@"In Objective-C, lowercase letters are significant.\nmain is where program execution begins.\nOpen and closed braces enclose program statements in a routine.\nAll program statements must be terminated by a semicolon.");
        int x;
        int y;
        
        x = 87;
        y = 15;
        
        x = x-y;
        NSLog(@"%i", x);
    }
    return 0;
}

有几点问题

一，长段文本输出时，可以分行书写代码吗？

二，赋值变量不用这样用吗？ int x = 87;