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-
-
- *** Listing 4 ***
-
- #include <stdio.h>
- #include <stdarg.h>
- #include <string.h>
-
- /*
- * Concatenate copies of a variable number strings into
- * s1. The list of strings must be terminated by NULL.
- * concat returns s1.
- */
- char *concat(char *s1, ...)
- {
- char *s = s1;
- const char *t;
- va_list ap;
-
- va_start(ap, s1);
- while ((t = va_arg(ap, const char *)) != NULL)
- {
- strcpy(s, t);
- s += strlen(s);
- }
- va_end(ap);
- return s1;
- }
-
- int main(void)
- {
- char s[100];
-
- puts(concat(s, "This ", "is ", "great!", NULL));
- return 0;
- }
-
-