Difference between revisions of "C-and-C++/C3/String-Library-Functions/English-timed"

|Welcome to the spoken-tutorial on '''String Library Functions in C'''  

|In this tutorial we will learn,    

|String Library Functions  

|We will do this with the help of some examples  

| Ubuntu Operating System version 11.10,  

|gcc Compiler Version 4.6.1  

|Let us see some of the string library functions  

|Here we have the '''strncpy''' function  

|The syntax for this is '''strncpy(char str1, char str2, and int n ) '''

|It copies first n characters of string '''str2 ''' into string '''str1'''

|example, '''char strncpy( char hello, char world, 2)'''

|The output will be '''Wollo '''

|Here we have '''Wo''' from the string 2 and rest of the characters from string 1  

|Now we will see '''strncmp''' function, the syntax for this is '''strncmp(char str1, char str2, and int n) '''  

|It will compare first n characters of string 2 with string 1  

|The output will be 0  

| I will open it  

|Here we have the string length function  

|Note that our filename is '''strlen.c. '''

|In this we will find the length of the string  

|This is our main function  

|Here we have a character variable ''' 'arr', '''

|It stores a value ''' 'Ashwini' '''

|Then we have an integer variable '''len1 '''

|Here we will find the lenght of the string using strlen function  

|The result will be stored in len1  

|And this is our return statement  

|Now let us execute the program  

|'''Ctrl, Alt''' and '''T''' keys simultaneously on your keyboard  

| To compile Type:'''  "gcc" ''' space ''' "strlen.c" ''' space ''' “-o”''' space''' “str1”'''. Press Enter  

|Type (dot slash)''' ./str1.''' Press Enter  

|You can count here. 1,2,3,4,5,6, and 7  

| Let us see another string function  

|Here we have the '''string copy''' fuction  

|Note that our filename is '''strcpy.c '''

|In this we will copy the source string into the target string  

|Here we have Ice in the source string, it will be copied to the target string  

|This is our strcpy function

|Here we will print the source string and the target string  

|Let us execute and see   

|Come back to our terminal  

| To compile type '''gcc '''space '''strcpy.c''' space hyphen ''' o''' space '''str2'''. Press '''Enter'''

|Type (dot slash)'''./str2 ''' .Press '''Enter '''

|The output is displayed as  

| Now let us see another string function  

|Now we will see the string compare function

|Note that our filename is '''strcmp.c'''

|In this we will comapre two strings  

|Here we have character variables as '''str1''' and '''str2 '''  

|Here we have interger variables as i and j  

|In this we will compare the string using the strcmp function  

|Here we compare str1 ie: 'Ice' with 'Hello'  

|The result is stored in i  

|In this we will compare string2 ie: 'Cream' with 'Cream'  

|The result is stored in j  

|Then we print both the results  

|And this is our return statement  

|Press '''Enter'''

|The outpur is displayed as 1,0  

|Come back to our program  

|Here we get 1 and here we get as 0  

|Let us come back to our slides  

|Let us summarize,

|In this tutorial we learned,  

 

 

|String library functions  

|strlen()  

|strcpy()  

|strcmp()  

 

 

|strncpy()  

|and strncmp()  

|Write a C Program to concatenate String best and String bus.  

|Watch the video available at the link shown below

|It summarizes the Spoken Tutorial project  

|If you do not have good bandwidth, you can download and watch it  

|The Spoken Tutorial Project Team  

|Conducts workshops using spoken tutorials  

|Gives certificates to those who pass an online test  

|For more details, please write to, contact@spoken-tutorial.org  

 

|Spoken Tutorial Project is a part of the Talk to a Teacher project  

|It is supported by the National Mission on Education through ICT, MHRD, Government of India

|More information on this Mission is available at the link shown below

|This is Ashwini Patil from IIT Bombay signing of.