#include<stdio.h>
#include<stdlib.h>
//#include<argp.h>
#include<stdarg.h>

char *convert(unsigned int num, int base)
{
	static char buf[33];
	char *ptr;
	
	ptr=&buf[sizeof(buf)-1];
	*ptr='\0';
	do
	{
		*--ptr="0123456789abcdef"[num%base];
		num/=base;
	}while(num!=0);
	return(ptr);
}


void myprintf(const char*str,...)
{
	
	const char *p;
	int i;
	unsigned u;
	char *s;
	//    printf(">>>>%s",str);
	//  printf ("%d",n);
	
	va_list argp;
	va_start(argp, str);
	
	p=str;
	
	for(; *p!='\0'; p++)
	{
		if(*p!='%')
		{
			putchar(*p);
			continue;
		}
		p++ ;
		switch(*p)
		{
			case 'c' : i=va_arg(argp,char);putchar(i);break;
			case 'd' : i=va_arg(argp,int);
			if(i<0){i=-i;putchar('-');}puts(convert(i,10));break;
			case 'o': i=va_arg(argp,unsigned int); puts(convert(i,8));break;
			case 's': s=va_arg(argp,char *); puts(s); break;
			case 'u': u=va_arg(argp,unsigned int); puts(convert(u,10));break;
			case 'x': u=va_arg(argp,int); puts(convert(u,16));break;
			case '%': putchar('%');break;
		}
	}
	
	va_end(argp);
}

int main()
{
	void myprintf(char *,...);
	char * convert(unsigned int, int);
	int i=65;
	char str[]="This is my string";
	myprintf("\nMessage = %s%d%x",str,i,i);
}