#include <stdlib.h> #include <string.h> #include <stdio.h> int main (int argc, char **argv) { int i = 0; // allocate a space in memory for result char *result = (char *) malloc (sizeof (*result)); *result = '\0'; while (i < argc) { // while there are still arguments char *s = (char *) malloc (sizeof (*s) * (strlen(result) + strlen(argv[i]) + 1)); strcpy (s, result); // add "free(result); here... strcat (s, argv[i]); // ... or here result = s; i++; } printf ("Concatenation: %s\n", result); return 0; }