一小段C++程序,关于ltoa函数的

Example.

/* ltoa example */#include <stdio.h>#include <stdlib.h>int main (){  int i;  char buffer [sizeof(long)*8+1];  printf ("Enter a number: ");  scanf ("%d",&i);  ltoa (i,buffer,10);  printf ("decimal: %s/n",buffer);  ltoa (i,buffer,16);  printf ("hexadecimal: %s/n",buffer);  ltoa (i,buffer,2);  printf ("binary: %s/n",buffer);  return 0;}

 

Convert long integer value to string.
  Converts a long integer value to a null-terminated string using the specified radix and stores the result in the given buffer.
  If radix is 10 and value is negative the string is preceded by the minus sign (-). With any other radix, value is always considered unsigned.
  buffer should be large enough to contain any possible value: (sizeof(long)*8+1) for radix=2.

Parameters.

value

Value to be represented as a string.

buffer

Buffer where to store the resulting string.

radix

Numeral radix in which value has to be represented, between 2 and 36.

Return Value.
  A pointer to the string.

Portability.
  Not defined in ANSI-C. Supported by some compilers.

Output:
Enter a number: 16021977
decimal: 16021977
hexadecimal: f479d9
binary: 111101000111100111011001