C-and-C++/C4/Function-Call/Gujarati
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Time' | Narration |
00:02 | Function call in C and C++ પરનાં સ્પોકન ટ્યુટોરીયલમાં સ્વાગત છે |
00:08 | આ ટ્યુટોરીયલમાં આપણે કોલ ફંકશનો વિશે શીખીશું જેમ કે, વેલ્યુ દ્વારા કોલ.
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00:15 | સંદર્ભ દ્વારા કોલ. |
00:17
આપણે આને ઉદાહરણ દ્વારા કરીશું. | |
00:20 | આ ટ્યુટોરીયલ રેકોર્ડ કરવાં માટે, હું વાપરી રહ્યી છું ઉબુન્ટુ ઓપરેટીંગ સીસ્ટમ આવૃત્તિ ૧૧.૧૦ gcc અને g++ કમ્પાઈલર આવૃત્તિ ૪.૬.૧ |
00:32 | functions call by value નાં પરીચય સાથે ચાલો શરૂઆત કરીએ
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00:37 | આ ફંક્શનમાં આર્ગ્યુમેન્ટો પસાર કરવાની એક પદ્ધતિ છે. |
00:40 | જયારે આપણે એક વેરીએબલને વેલ્યુ દ્વારા પસાર કરીએ છીએ તે વેરીએબલની એક નકલ બનાવે છે. |
00:46 | ફંક્શન પર પસાર થવાની પહેલા. |
00:49 | ફંક્શનની અંદર આર્ગ્યુમેન્ટોને કરેલ ફેરફારો ફંક્શનમાં જ રહેશે. |
00:55 | તે ફંક્શનની બહાર અસર કરશે નહી. |
00:59 | વેલ્યુ દ્વારા કોલ ફંક્શન પર ચાલો એક પ્રોગ્રામ જોઈએ. |
01:02 | I have already typed the program on the editor. i will just open it. |
01:08 | Please note our filename is callbyval.c.
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01:13 | In this program we will calculate the cube of a number. Let me explain the code now. |
01:20 | This is our header file |
01:22 | Here we have function cube having an argument as int x. |
01:28 | In this we calculate the cube of x and return the value of x. |
01:34 | This is our main function. |
01:37 | Here we give the value of n as 8. n is an integer variable |
01:44 | Then we call the function cube. |
01:46 | And print the value of n and the cube of n. |
01:50 | And This is our return statement. |
01:53 | Now let us execute the program.
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01:55 | open the terminal window by pressing ' Ctrl, Alt and T keys simultaneously on your keyboard. |
02:03 | To compile , type |
02:04 | gcc callbyval.c -o val. Press Enter |
02:13 | Now type ./val.Press Enter |
02:17 | The output is displayed as Cube of 8 is 512. |
02:23 | Now we will see function call by reference. |
02:27 | Let us go back to our slides. |
02:29 | It is another method of passing arguments to the function. |
02:34 | This method copies the address of the argument instead of the value. |
02:40 | Changes made to the arguments inside a function can affect them outside. |
02:46 | In this we need to declare the arguments as pointer type. |
02:51 | Let us see an example on function call by reference. |
02:55 | Note that our filename is callbyref.c
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02:59 | This is our headerfile as stdio.h |
03:03 | Then we have function swap
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03:06 | This function will exchange the values of the variables.
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03:11 | Value of *a will be stored in value of *b and vice-versa. |
03:16 | You can see that the arguments passed in the function are pointer type. |
03:22 | Here we have declared an integer variable t. |
03:25 | First value of *a is stored in t. |
03:29 | Then value of *b is stored in *a. |
03:33 | And Then value of t is stored in *b . |
03:37 | Like this the values are exchanged. |
03:40 | This is our main function. |
03:43 | Here we have declared two integer variables as i and j . |
03:49 | Then we take the values of i and j as user inputs. |
03:54 | &i and &j will give the memory address of i and j. |
04:00 | First we print the values before swapping. |
04:05 | Then we call the function swap |
04:07 | And then we print the values after swapping. |
04:11 | And This is our return statement. |
Click on Save | |
04:14 | Now let us execute the program |
04:17 | Switch back to our terminal |
04:19 | To compile type |
04:22 | gcc callbyref.c -o ref. Press Enter |
04:30 | Now type ./ref. Press Enter
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04:34 | We see, enter the values I will enter as 6 and 4 |
04:40 | The output is displayed as,before swapping 6 and 4 |
04:45 | After swapping 4 and 6 |
04:48 | NOW LET US SEE HOW TO EXECUTE THE SAME PROGRAM IN C++ |
04:53 | I have the code, lets go through it. |
04:58 | This is the second program function callbyreference . |
05:02 | Note that our filename is callbyref.cpp |
05:07 | Let us go through the code now |
05:09 | This is ou header file as iostream
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05:13 | Here we are using the std namespace |
05:16 | The function declaration is same in C++. |
05:20 | In this we pass the arguments as &x and &y. |
05:25 | This will give the memory address of x and y. |
05:30 | Then we swap the values. |
05:33 | Rest of the code is similar to our C code. |
05:37 | The printf' statement is replaced by cout and the scanf statement is replaced by cin |
05:44 | Now let us execute the program. Come back to our terminal |
05:49 | To compile type; g++callbyref.cpp -o ref1 press Enter |
06:01 | Now Type ./ref1, Press Enter |
06:06 | Here it is displayed as: |
06:07 | Enter values of a and b |
06:10 | I will enter as 4 and 3 |
06:14 | The output is displayed |
06:16 | Before swapping a and b: 4 and 3 |
06:20 | After swapping a and b: 3 and 4 |
06:24 | This brings us to the end of this tutorial. |
06:27 | Let us go back to our slides. |
06:30 | Let us summarize, In this tutorial we learn't: |
06:33 | Function call by value. |
06:35 | And Function call by reference. |
06:38 | As an assignment |
06:39 | Write a similar program to calculate the cube of a number. |
06:43 | Using call by value in C++. |
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07:27 | This is Ashwini Patil from IIT Bombay. Signing off.
Thank You for joining |