String functions in C
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This document provides an overview of common string functions in C including strcmp(), strcat(), strcpy(), and strlen(). It defines each function, explains what it is used for, provides the syntax, and includes examples of how each string function works in C code. Overall, the document is a tutorial on the most common string manipulation functions available in the standard C string library.
![Strcmp
Syntax
int strcmp ( const char * str1, const char * str2 );
Example
int main()
{
char str1[30],str2[30];
printf("Enter first string: ");
scanf("%s",&str1);
printf("Enter second string: ");
scanf("%s",&str2);
if(strcmp(str1,str2)==0)
printf("Both strings are equal");
else printf("Strings are unequal");
return 0;
}](https://image.slidesharecdn.com/stringfunctions-131116015406-phpapp02/85/String-functions-in-C-9-320.jpg)
![Strcat
Syntax
strcat(first_string,second_string);
Example
int main()
{
char str1[30]="www.cprogramming";
char str2[15]="expert.com";
printf("nn string 1 : %stt string 2 : %snn",str1,str2);
printf("nn strcat(str1,str2) : %snn", strcat(str1,str2));
getch();](https://image.slidesharecdn.com/stringfunctions-131116015406-phpapp02/85/String-functions-in-C-10-320.jpg)
![Strcpy
Syntax
strcpy(destination,source);
Example
int main()
{
char a[10],b[10];
printf("Enter string: ");
scanf("%s",&a);
strcpy(b,a);
printf("Copied string: ");
printf("%s",b);
return 0;
}](https://image.slidesharecdn.com/stringfunctions-131116015406-phpapp02/85/String-functions-in-C-11-320.jpg)
![Strlen
Syntax
temp_variable = strlen(string_name);
Example
int main()
{
char a[20];
printf("Enter string: ");
scanf("%s",&a);
printf("Length of string =%d n",strlen(a));
}](https://image.slidesharecdn.com/stringfunctions-131116015406-phpapp02/85/String-functions-in-C-12-320.jpg)
String functions in C
- 2. String Functions in C Typing Speed: 25 Ismail [email protected] Ismail Ismu Ismail Ismu in.linkedin.com/in/profilena me 8086303494
- 3. String Function The standard library for C string functions is string.h. This header file defines tons of useful string manipulation functions including
- 4. String Functions strcmp strcat strcpy strlen
- 5. strcmp • Strcmp() in C programming language is used to compare two strings. If both the strings are equal then it gives the result as zero but if not then it gives the numeric difference between the first non matching characters in the strings.
- 6. strcat • The strcat() function is used for string concatenation in C programming language. It means it joins the two strings together
- 7. strcpy • strcpy function copies a string from a source location to a destination location and provides a null character to terminate the string.
- 8. strlen The strlen( ) function is used to calculate the length of the string. It means that it counts the total number of characters present in the string which includes alphabets, numbers, and all special characters including blank spaces.
- 9. Strcmp Syntax int strcmp ( const char * str1, const char * str2 ); Example int main() { char str1[30],str2[30]; printf("Enter first string: "); scanf("%s",&str1); printf("Enter second string: "); scanf("%s",&str2); if(strcmp(str1,str2)==0) printf("Both strings are equal"); else printf("Strings are unequal"); return 0; }
- 10. Strcat Syntax strcat(first_string,second_string); Example int main() { char str1[30]="www.cprogramming"; char str2[15]="expert.com"; printf("nn string 1 : %stt string 2 : %snn",str1,str2); printf("nn strcat(str1,str2) : %snn", strcat(str1,str2)); getch();
- 11. Strcpy Syntax strcpy(destination,source); Example int main() { char a[10],b[10]; printf("Enter string: "); scanf("%s",&a); strcpy(b,a); printf("Copied string: "); printf("%s",b); return 0; }
- 12. Strlen Syntax temp_variable = strlen(string_name); Example int main() { char a[20]; printf("Enter string: "); scanf("%s",&a); printf("Length of string =%d n",strlen(a)); }
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