送分送分：数据转换问题

[Qinriwei]

如何将一字符串转换成16进制数，如“3004”转换成0x3004

[cloud_soft]

atoi,itoa,sprintf ......

[TigerHu]

s = "3004";
i = atoi( s );

[TigerHu]

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

void main( void )
{
char *s; double x; int i; long l;

s = " -2309.12E-15"; /* Test of atof */
x = atof( s );
printf( "atof test: ASCII string: %s\tfloat: %e\n", s, x );

s = "7.8912654773d210"; /* Test of atof */
x = atof( s );
printf( "atof test: ASCII string: %s\tfloat: %e\n", s, x );

s = " -9885 pigs"; /* Test of atoi */
i = atoi( s );
printf( "atoi test: ASCII string: %s\t\tinteger: %d\n", s, i );

s = "98854 dollars"; /* Test of atol */
l = atol( s );
printf( "atol test: ASCII string: %s\t\tlong: %ld\n", s, l );
}

[iamjx1234]

char s[100] = "3004";
char * ss=NULL;
ss=s;
bool b_err=(strlen(s)==0);
while(*ss!=0)
{
if((*ss<'0') || (*ss>'9'))
{
b_err=1;
break;
}
*ss -= '0';
ss++;
}
if(b_err)
::AfxMessageBox("error");
*ss=NULL;

[Qinriwei]

to:：　iamjx1234(iamjx1234)　
补充一下，0x3004是存放在一个short变量中的，空间只有2字节

[iamjx1234]

谢分