Appends a copy of the source string to the destination string. The terminating null character in destination is overwritten by the first character of source, and a null-character is included at the end of the new string formed by the concatenation of both in destination.
destination and source shall not overlap.
Pointer to the destination array, which should contain a C string, and be large enough to contain the concatenated resulting string.
C string to be appended. This should not overlap destination.
destination is returned.
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/* strcat example */
int main ()
strcpy (str,"these ");
strcat (str,"strings ");
strcat (str,"are ");