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#include<stdio.h> #include<conio.h> #include<math.h> #define MAX 100 void nhap (int 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("%d", &a[i]); } } void xuat(int a[], int n) { for(int i = 0; i < n; i++) { printf("%4d", a[i]); } } int DemSoLuongPhanTuKeNhauMaCa2TraiDau(int a[], int n) { int dem = 0; for(int i = 0; i < n; i++) { if(a[i] * a[i + 1] < 0) { dem++; } } if(dem != 0) { dem++; } return dem; } int main() { int n; int a[MAX]; nhap(a, n); xuat(a, n); int dem = DemSoLuongPhanTuKeNhauMaCa2TraiDau(a, n); printf("\nSo luong phan tu ke nhau ma ca 2 trai dau = %d", dem); getch(); return 0; }
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