agrego practicas

c/swap/main.c

@@ -0,0 +1,28 @@
+#include <stdio.h>
+
+void swap(char **, char**);
+void swap_int(int *, int *);
+
+int main(void){
+  char *s1 = "Hola";
+  char *s2 = "Mundo";
+  int n1 = 10;
+  int n2 = 20;
+  swap(&s1, &s2);
+  swap_int(&n1, &n2);
+  printf("s1: %s s2: %s\n", s1, s2);
+  printf("n1: %d n2: %d\n", n1, n2);
+  return 0;
+}
+
+void swap(char **s1, char **s2){
+  char *aux = *s1;
+  *s1 = *s2;
+  *s2 = aux;
+}
+
+void swap_int(int* n1, int* n2){
+  int aux = *n1;
+  *n1 = *n2;
+  *n2 = aux;
+}