使用Java代码将IP地址转换为int类型的方法

  #include <stdio.h> 
  #include <stdlib.h> 
  #include <string.h> 
  #include <math.h> 
   
  #define LEN 16 
   
  typedef unsigned int uint; 
   
  /** 
   * 字符串转整形 
   */ 
  uint ipTint(char *ipstr) 
  { 
    if (ipstr == NULL) return 0; 
   
    char *token; 
    uint i = 3, total = 0, cur; 
   
    token = strtok(ipstr, "."); 
   
    while (token != NULL) { 
      cur = atoi(token); 
      if (cur >= 0 && cur <= 255) { 
        total += cur * pow(256, i); 
      } 
      i --; 
      token = strtok(NULL, "."); 
    } 
   
    return total; 
  } 
   
  /** 
   * 逆置字符串 
   */ 
  void swapStr(char *str, int begin, int end) 
  { 
    int i, j; 
   
    for (i = begin, j = end; i <= j; i ++, j --) { 
      if (str[i] != str[j]) { 
        str[i] = str[i] ^ str[j]; 
        str[j] = str[i] ^ str[j]; 
        str[i] = str[i] ^ str[j]; 
      } 
    } 
  } 
   
  /** 
   * 整形转ip字符串 
   */ 
  char* ipTstr(uint ipint) 
  { 
    char *new = (char *)malloc(LEN); 
    memset(new, '\0', LEN); 
    new[0] = '.'; 
    char token[4]; 
    int bt, ed, len, cur; 
   
    while (ipint) { 
      cur = ipint % 256; 
      sprintf(token, "%d", cur); 
      strcat(new, token); 
      ipint /= 256; 
      if (ipint) strcat(new, "."); 
    } 
   
    len = strlen(new); 
    swapStr(new, 0, len - 1); 
   
    for (bt = ed = 0; ed < len;) { 
      while (ed < len && new[ed] != '.') { 
        ed ++; 
      } 
      swapStr(new, bt, ed - 1); 
      ed += 1; 
      bt = ed; 
    } 
   
    new[len - 1] = '\0'; 
   
    return new; 
  } 
   
  int main(void) 
  { 
    char ipstr[LEN], *new; 
    uint ipint; 
   
    while (scanf("%s", ipstr) != EOF) { 
      ipint = ipTint(ipstr); 
      printf("%u\n", ipint); 
   
      new = ipTstr(ipint); 
      printf("%s\n", new); 
    } 
   
    return 0; 
  }