C, pasted on Sep 28:
 ```1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 ``` ```#include #include #include #define MAX 100 void nhap (float a[], int &n) { do { printf("\nNhap so phan tu: "); scanf("%d", &n); if(n <= 0 || n > MAX) { printf("\nSo phan tu khong hop le. Xin kiem tra lai !"); } }while(n <= 0 || n > MAX); for(int i = 0; i < n; i++) { printf("\nNhap a[%d]: ", i); scanf("%f", &a[i]); } } void xuat(float a[], int n) { for(int i = 0; i < n; i++) { printf("%8.3f", a[i]); } } void LietKe(float a[], int n) { int i, j; printf("\nCac cap gia tri (a, b) thoa DK a <= b , khac nhau tung doi mot: "); for (i = 0; i < n; i++) { for (j = i + 1; j < n; j++) { if (a[i] < a[j] || a[i] == a[j]) { printf("\nCap <%.3f, %.3f> vi tri ", a[i], a[j], i, j); } } } } int main() { int n; float a[MAX]; nhap(a, n); xuat(a, n); LietKe(a, n); getch(); return 0; } ```

Output:
 ```1 2 3 4 ``` ```Line 17: error: conio.h: No such file or directory Line 6: error: expected ';', ',' or ')' before '&' token In function 'xuat': Line 26: error: 'for' loop initial declaration used outside C99 mode ```