#include
    
     #include
     
      #include
      
       void myprintf(const char *s1, ...){	assert(s1 != NULL);	va_list arg;	char c;	char ch;	char *str;	int temp;	va_start(arg, s1);	while (c=*s1++)	{		switch (c)		{		case'%' :			break;		case 'c':			ch = va_arg(arg,int);			putchar(ch);			break;		case 's':			str = va_arg(arg, char *);			fputs(str, stdout);			break;		case 'd':			temp = va_arg(arg, int);			printf("%d",temp);			break;		default:			putchar(c);		}		}	va_end(arg);}int main(){	char *s = "aaaaaa";	char c = 'b';	int i = 1997;	myprintf("%s\n %c \n%d", s, c, i);	system("pause");}