Program to concatenate the two strings without using build in functions?

Answer 1

#include<iostream>

#include<string>

int main()

{

using std::string;

string a = "hand";

string b = "bag";

string c = a + b; // concatenation

}

Answer 2

Using Java:

class concat

{

public static void main(Strig Args[])

{

String str1 = "Wel";

String str2 = "Come";

String str3 = str1 + str2;

System.out.println("Concatenated:" + str3);

}

}

Using C:

#include <stdlib.h>

#include <stdio.h>

int main()

{

const char str1 [] = "Wel";

const char str2 [] = "Come";

char str3 [128], *p, *q;

q= str3;

for (p= str1; *p; ++p) *q++ = *p;

for (p= str2; *p; ++p) *q++ = *p;

*q= '\0';

printf("%s", str3);

return 0;

}

Answer 3

#include<iostream>

char* concat(char* str1, char* str2)

{

int len1 = strlen(str1);

int len2 = strlen(str2);

char * str = ( char* ) malloc( len1+ len2 + 1 );

char * ptr = str + len1;

memcpy( str, str1, len1 );

memcpy( ptr, str2, len2 + 1 );

ptr = NULL;

return( str );

}

int main()

{

char string1[] = "This is the first string";

char string2[] = " and this is the second string.";

char* string3 = concat( string1, string2 );

std::cout<<string3<<std::endl;

free( string3 );

return(0);

}

Answer 4

If you have let's say string1 = "blablabla1" and string2 = "blablabla2". To concatenate 2 strings you can use simbol +. So, string1 + string2 will be one string.

Answer 5

p1= from1;
p2= from2;
q= to;

while ((*q++= *p1++)!='\0');
--q;
while ((*q++= *p2++)!='\0');