C Programming: Understanding Pointer Arithmetic and Function Return Values

The output of this program is:

'124, 124,'

Explanation:

• The function 'change()' takes a pointer to an integer as its argument and returns the value of the integer after incrementing it by 1.
• In the 'main()' function, an integer variable 'data' is initialized with the value 123.
• The function 'change()' is called with the address of 'data' as its argument. This increments the value of 'data' to 124, but the return value of the function is not used.
• The value of 'data' is printed to the console using 'printf()', which outputs '124,' followed by a comma.
• The function 'change()' is called again with the address of 'data' as its argument. This increments the value of 'data' to 125, and the return value of the function is assigned to 'data'.
• The value of 'data' is printed to the console again using 'printf()', which outputs '125,' followed by a comma.
• The program then returns 0 to indicate successful termination.