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  1. #include <stdio.h>
  2.  
  3. char *strcpy2 (char *str1, char *str2)
  4. {
  5.     int total = strlen (str1) + strlen (str2) + 1;
  6.     char *nstr = malloc (sizeof (char) * total);
  7.     char *str = nstr;
  8.     while (*str1 != '\0') *nstr++ = *str1++;
  9.     while (*str2 != '\0') *nstr++ = *str2++;
  10.     *nstr = '\0';
  11.     printf ("size: %d\n", strlen (str));
  12.     return str;
  13. }
  14.  
  15. int main (void)
  16. {
  17.     char *concat = strcpy2 ("Hello, ", "World.");
  18.     puts (concat);
  19.     free (concat);
  20.     return 0;
  21. }
  22.  
Success #stdin #stdout 0s 2292KB
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stdin
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Standard input is empty
stdout
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size: 13
Hello, World.
https://ideone.com/ncpVMU
language:
C (gcc 8.3)
created:
8 years ago
visibility:
public

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