#include <stdlib.h> #include <stdio.h> #include <string.h> int main(void) { char *p; p = malloc(17); if(!p) { printf("Allocation Error\n"); exit(1); } strcpy(p, "This is 16 chars"); p = realloc(p, 18); if(!p) { printf("Allocation Error\n"); exit(1); } strcat(p, "."); printf(p); free(p); return 0; }