lap trinh c-gui my trinh

[donghuuquan]

da test
bai chuyen doi:
#include <stdio.h>

void chuyendoi(int n)
{
if (n > 0) {
chuyendoi(n/2);
printf("%d",n%2);
}
}

int main()
{
int n;
printf("Nhap vao so : ");
scanf("%d",&n);
chuyendoi(n);
return 0;
}





bai viet nguoc
#include <stdio.h>
#include <conio.h>
#include<string.h>
char *DaoChuoi(int i,char*s)
{

char ch;
if (i>=strlen(s)/2) return(s);
else
{
ch=s[i];
s[i]=s[strlen(s)-i-1];
s[strlen(s)-i-1]=ch;
s=DaoChuoi(i+1,s);
}
}
main()
{
char *s;
printf("Nhap chuoi : ");
gets(s);
printf("Chuoi dao : %s\n",DaoChuoi(0,s));
getch();
}