What is the difference between a function passing array and a passing address in C language

This article introduces the knowledge of "what is the difference between C language function transfer array and delivery address". In the operation of actual cases, many people will encounter such a dilemma. Next, let the editor lead you to learn how to deal with these situations! I hope you can read it carefully and be able to achieve something!

Catalogue

Transfer value

Delivery address

Note:

Transfer value

Code:

# include void deliveryData (int data) {data= data + 100; printf ("deliveryData:data=%d\ n", data);} int main (void) {int data=10; deliveryData (data); printf ("main:data=%d\ n", data); return 0;}

Running result:

C:\ Users\ Administrator\ Desktop\ C_Study\ new version c language\ program\ unit5_function > a.exe

DeliveryData:data=110

Main:data=10

Delivery address

Code:

# include void deliveryData (int data []) / / where int data [] is the address (equivalent to pointer) {data [0] = data [0] + 100; printf ("deliveryData:data=%d\ n", data [0]);} int main (void) {int data [2] = {1,2}; deliveryData (data); / / the address printf ("main:data=%d\ n", data [0]) is passed here Return 0;}

Running result:

C:\ Users\ Administrator\ Desktop\ C_Study\ new version c language\ program\ unit5_function > a.exe

DeliveryData:data=101

Main:data=101

Note:

Pass values, operate on different memory space transfer addresses, and operate on the same memory space

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