Detailed description of OC helloworld Program

1 # import <Foundation/Foundation. h> 2 3 int main (INT argc, const char * argv []) 4 {5 @ autoreleasepool {6 nslog (@ "Hello world! "); 7} 8 9 return 0; 10}

# Import is provided by the GCC compiler. # import ensures that the header file is referenced only once;

# Import <Foundation/Foundation. h> references the foundation framework in the cocoa combination framework,

Nslog is a function of the foundation framework. Print the function.

Note: Cocoa functions starting with ns are not functions of other toolkit.

@ Symbol is one of the features of Object-C based on the Standard C language library. @ "Hello World" uses the nsstring class of cocoa.

@ Autoreleasepool {} The Pool Program for memory Auto Release is generally written here

 

Detailed description of OC helloworld Program