#include "stdio.h"
#include "stdlib.h"
int main(void)
{
 int num = 10;
 char str[100];
 itoa(num, str, 8);      //將整數(shù)10轉(zhuǎn)換為八進(jìn)制保存在str字符數(shù)組中
 printf("%s\n", str);
 system("pause");
 return 0;
}

#include "stdio.h"
#include "stdlib.h"
int main(void)
{
 int num = 15;
 char str[100];
 int n = atoi(itoa(num, str, 2));   //先把num轉(zhuǎn)換為二進(jìn)制的字符串，再把該字符串轉(zhuǎn)換為整數(shù)
 printf("%d\n",n);
 system("pause");
 return 0;
}

char *_itoa( int value, char *string, int radix );
char *_i64toa( __int64 value, char *string, int radix );
char * _ui64toa( unsigned _int64 value, char *string, int radix );
wchar_t * _itow( int value, wchar_t *string, int radix );
wchar_t * _i64tow( __int64 value, wchar_t *string, int radix );
wchar_t * _ui64tow( unsigned __int64 value, wchar_t *string, int radix );

#include "stdio.h"
#include "stdlib.h"
int main(void)
{
 char buffer[20];
 int i = 3445;
 long l = -344115L;
 unsigned long ul = 1234567890UL;
 _itoa( i, buffer, 10 );
 printf( "String of integer %d (radix 10): %s\n", i, buffer );
 _itoa( i, buffer, 16 );
 printf( "String of integer %d (radix 16): 0x%s\n", i, buffer );
 _itoa( i, buffer, 2 );
 printf( "String of integer %d (radix 2): %s\n", i, buffer );
 _ltoa( l, buffer, 16 );
 printf( "String of long int %ld (radix 16): 0x%s\n", l,buffer );
 _ultoa( ul, buffer, 16 );
 printf( "String of unsigned long %lu (radix 16): 0x%s\n", ul,buffer );
 system("pause");
 return 0;
}