help combining strings

[BlaineYIGz]

Hi, I’m a total newbie at this. I’m really struggling here. any help would be awsome!
the instructions are: Include the string library functions strlen(), strcat(), and strncat() within a function having the prototype concat(char string1[], char string2[], int maxlength)

Here is what I need to do:
read in string 1
read in string 2
pass both strings to the concat function
Once I am in the function, I need to get the length of both strings.
if the length of string1 + the length of string 2 is greater than the maximum number of characters allowed
use strncat and limit the number of characters copied to maximumnumber – length of string 1
otherwise use strcat and copy all of string 2 into string 1

I could use some help with the code. Not sure what I’m doing and again, any help would be great. thanks
what I have so far is…

#include <stdio.h><br /> #include <string.h><br /> <br /> void concat(char s1[], char s2[], maxlength);<br /> <br /> int main()<br /> {<br /> #define maxlength 101<br /> char s1[MAX];<br /> char s2 [MAX];<br /> <br /> printf("Enter the first string");<br /> gets(s1);<br /> printf("Enter the second string");<br /> gets(s2);<br /> printf("The combined string is:n",strcat(s1,s2));<br /> <br /> <br /> return 0;<br /> }<br />

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#include <stdio.h><br /> #include <string.h><br /> <br /> void concat(char s1[], char s2[], maxlength);<br /> <br /> int main()<br /> {<br /> #define maxlength 101<br /> char s1[MAX];<br /> char s2 [MAX];<br /> <br /> printf("Enter the first string");<br /> gets(s1);<br /> printf("Enter the second string");<br /> gets(s2);<br /> printf("The combined string is:n",strcat(s1,s2));<br /> <br /> <br /> return 0;<br /> }<br />

[GWILouisaxwzkla]

Could try:

<br /> #include <br /> #include <br /> #define MAX 101<br /> char * concat ( char s1[], char s2[], int maxlength );<br /> <br /> int main()<br /> {<br /> #define MAX 101<br /> char s1 [ MAX ];<br /> char s2 [ MAX ];<br /> <br /> printf("Enter the first string ");<br /> gets(s1);<br /> printf("Enter the second string ");<br /> gets(s2);<br /> printf("The combined string is: %s n", concat ( s1 , s2 , MAX ) );<br /> <br /> <br /> return 0;<br /> }<br /> <br /> char * concat ( char s1[], char s2[], int maxlength )<br /> {<br /> <br /> if ( strlen ( s1 ) + strlen ( s2 ) &gt; maxlength )<br /> return s1;//stings too long , return first string as default<br /> strcat ( s1 , s2 ); //stick s2 to the back of s1<br /> return s1;<br /> }

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<br /> #include <br /> #include <br /> #define MAX 101<br /> char * concat ( char s1[], char s2[], int maxlength );<br /> <br /> int main()<br /> {<br /> #define MAX 101<br /> char s1 [ MAX ];<br /> char s2 [ MAX ];<br /> <br /> printf("Enter the first string ");<br /> gets(s1);<br /> printf("Enter the second string ");<br /> gets(s2);<br /> printf("The combined string is: %s n", concat ( s1 , s2 , MAX ) );<br /> <br /> <br /> return 0;<br /> }<br /> <br /> char * concat ( char s1[], char s2[], int maxlength )<br /> {<br /> <br /> if ( strlen ( s1 ) + strlen ( s2 ) &gt; maxlength )<br /> return s1;//stings too long , return first string as default<br /> strcat ( s1 , s2 ); //stick s2 to the back of s1<br /> return s1;<br /> }

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