Language in C 面试题与答案

Question: Can we convert an unsigned long integer value to a string?

Answer: The function ultoa( ) can be used to convert an unsigned long integer value to a string. This function takes three arguments, first the value that is to be converted, second the base address of the buffer in which the converted number has to be stored (with a string terminating null character '') and the last argument specifies the base to be used in converting the value. Following example demonstrates the use of this function.

#include <stdlib.h>
void main( )
{
unsigned long ul = 3234567231L ;
char str[25] ;

ultoa ( ul, str, 10 ) ;
printf ( "str = %s unsigned long = %lun", str, ul ) ;
}