!lezione-13.md

Esercizi della Lezione 13

esercizio-1.c

#include "stdio.h"

int string_length(char * str) {
  if (*str == '\0') {
    return 0;
  }
  else {
    return string_length(str + 1) + 1;
  }
}

int main() {
  
  char str[1000] = { '\0' };
  
  scanf("%s", &str);
  
  printf("%d\n", string_length(str));
  
  return 0;
}

esercizio-2.c

#include <stdio.h>
#include <stdlib.h>

char* string_join(char *s1, int size1, char *s2, int size2) {
  
  char *r = malloc(sizeof(char) * (size1 + size2 + 1));
  *(r + (size1 + size2)) = '\0';
  
  for (int i = 0; i < size1; i++) {
    *(r + i) = *(s1 + i);
  }
  
  for (int i = size1; i < size1 + size2; i++) {
    *(r + i) = *(s2 + (i - size1));
  }
  
  return r;
}

int main() {
  
  int m;
  scanf("%d", &m);
  char *s1 = malloc(sizeof(char) * (m + 1));
  scanf("%s", s1);
  
  int n;
  scanf("%d", &n);
  char *s2 = malloc(sizeof(char) * (n + 1));
  scanf("%s", s2);
  
  char *r = string_join(s1, m, s2, n);
  printf("%s", r);
  
  return 0;
}