1 /* Clones a given string entered as arguments of function main; */ 2 #include <stdio.h> 3 #include <stdlib.h> 4 #include <string.h> 5 6 #define NO_ARGUMENT 1 7 #define INIT_SIZE 100 8 9 typedef enum { 10 OK, 11 ERROR_PROGRAM_INVOCATION, 12 ERROR_NULL_POINTER, 13 ERROR_ALLOC_MEMORY 14 } status_t; 15 16 status_t validar_argumentos(int argc, char **argv); 17 18 int main (int argc, char * argv[]) 19 { 20 char *dest; 21 size_t i; 22 status_t st; 23 24 /* Verify if arguments are right; */ 25 if((st = validar_argumentos(argc, argv))) return st; 26 27 /* Allocates memmory in heap of size INIT_SIZE; */ 28 if(!(dest = (char *)malloc(INIT_SIZE * sizeof(char)))) 29 return ERROR_ALLOC_MEMORY; 30 31 /* Assigns 1 to i to avoid the first element of argv, which is the program name. Then copies every string of argv into dest and prints it on stdout; */ 32 for(i = 1; (int)i < argc; i++) { 33 strcpy(dest, argv[i]); 34 /* Puts a space in between strings, avoiding a blank space after first string is printed; */ 35 if(i != 1) putchar(' '); 36 printf("%s", dest); 37 } 38 39 /* Adds the new line character; */ 40 putchar('\n'); 41 free(dest); 42 return OK; 43 } 44 45 status_t validar_argumentos(int argc, char **argv) 46 { 47 if(argc == NO_ARGUMENT) return ERROR_PROGRAM_INVOCATION; 48 if(!argv) return ERROR_NULL_POINTER; 49 50 return OK; 51 }
