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What is strcpy() Function in C language?
The C library function char *strcpy(char *dest, const char *src) copies the string pointed to, by src to dest.
An array of characters is called a string.
Declaration
Following is the declaration for an array
char stringname [size];
For example − char string[50]; string of length 50 characters
Initialization
- Using single character constant −
char string[10] = { ‘H’, ‘e’, ‘l’, ‘l’, ‘o’ ,‘\0’}- Using string constants −
char string[10] = "Hello":;
Accessing − There is a control string "%s" used for accessing the string till it encounters ‘\0’
The strcpy ( ) function
This function is used for copying source string into destination string.
The length of the destination string is greater than or equal to the source string.
Syntax
The syntax is as follows −
strcpy (Destination string, Source String);
Example
The following example shows the usage of strcpy() function.
char a[50]; char a[50];
strcpy ("Hello",a); strcpy ( a,"hello");
output: error output: a= "Hello"Program
The following program shows the usage of strcpy() function.
#include <string.h>
main ( ){
char a[50], b[50];
printf ("enter a source string");
scanf("%s", a);
strcpy ( b,a);
printf ("copied string = %s",b);
getch ( );
}Output
When the above program is executed, it produces the following result −
Enter a source string : Hello Copied string = Hello
Let’s see another example on strcpy.
Given below is a C program demonstrating strcpy library function −
Program
#include<stdio.h>
#include<string.h>
void main(){
//Declaring source and destination strings//
char source[25],destination[50];
//Reading Input from user//
printf("Enter the string to be copied : ");
gets(source);
printf("Enter the existing destination string : ");
gets(destination);
//Using strcpy library function//
strcpy(destination,source);
//Printing destination string//
printf("Destination string is : ");
puts(destination);
}Output
When the above program is executed, it produces the following result −
Enter the string to be copied : C programming Enter the existing destination string : bhanu Destination string is : C programming
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