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String Handling and Manipulation in C: Functions and Examples, Slides of Computer Programming

Biju Patnaik University of TechnologyComputer Programming

An introduction to string handling and manipulation in c programming language. It covers various functions such as isdigit(), isalpha(), isalnum(), islower(), isupper(), tolower(), toupper(), isspace(), iscntrl(), ispunct(), isprint(), isgraph(), atof(), atoi(), atol(), strcpy(), strncpy(), strcmp(), strncmp(), strcat(), strncat(), strlen(), strchr(), strcspn(), strspn(), strpbrk(), strrchr(), and strstr(). The document also includes examples of using these functions.

Typology: Slides

2011/2012

Uploaded on 11/06/2012

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Introduction to Programming
Lecture 17
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Introduction to Programming

Lecture 17

String Handling

Character

ASCII

Example 1

#include<iostream.h>

main ( )

int i ;
char c ;
for( i = 0; i < 256 ; i ++ )
c = i ;
cout << i << “\t” << c <<endl ;

ctype Functions int isdigit ( int c ) int isalpha ( int c ) int isalnum ( int c ) int isxdigit ( int c ) int islower ( int c ) int isupper ( int c ) int tolower ( int c ) int toupper ( int c ) int isspace ( int c ) int iscntrl ( int c ) int ispunct ( int c ) int isprint ( int c ) int isgraph ( int c )

isalpha ( ) Function int isalpha ( int c ) ;

isalnum ( ) Function int isalnum ( int c ) ;

isupper ( ) Function int isupper ( int c ) ;

tolower ( ) Function int tolower ( int c ) ;

getchar ( ) ;

cout << “Please enter a character string then press enter”; while ( ( c = getchar ( ) ) != ‘\n’ ) { if ( islower ( c ) ) lc ++ ; else if ( isupper ( c ) ) uc ++ ; else if (isdigit ( c ) ) dig ++; else if ( isspace ( c ) ) ws ++ ; else if ( ispunct ( c ) ) pun ++ ; else oth ++ ; }

atoi ( ) Function char str [ ] ; int age ; age = atoi ( str ) ;

atof ( ) Function