Question

How to use strcat() function to append (concatenate) a string s1[] to s2[] in C

Answer 1

#include <stdio.h>
#include <string.h>

int main(void)
{
	char s[256];
	
	strcpy(s, "abc ");
	
	strcat(s, "defg ");
	strcat(s, "hijk ");
	strcat(s, "lmnop");
	
	puts(s);
	
	return 0;
}

 
/*
   
run:
   
abc defg hijk lmnop

*/

 

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Answer 2

#include <stdio.h>
#include <string.h>

int main(void)
{
	char s[256];
	
	strcpy(s, "abc ");
	
	strcat(strcat(strcat(s, "defg "), "hijk "), "lmnop");
	
	puts(s);
	
	return 0;
}

 
/*
   
run:
   
abc defg hijk lmnop

*/

 

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