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#include<stdio.h> #include<conio.h> #include<math.h> #define MAX 100 void NhapMaTran(int a[][MAX], int &n) { do { printf("\nNhap n: "); scanf("%d", &n); if(n < 1 || n > MAX) { printf("\nSo phan tu khong hop le. Xin kiem tra lai !"); } }while(n < 1 || n > MAX); for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { printf("\nNhap vao a[%d][%d] = ", i, j); scanf("%d", &a[i][j]); } } } void XuatMaTran(int a[][MAX], int n) { for(int i = 0; i < n; i++) { for(int j = 0; j < n; j++) { printf("%4d",a[i][j]); } printf("\n\n"); } } void HoanVi(int &a, int &b) { int temp = a; a = b; b = temp; } void HoanVi2Dong(int a[][MAX], int n, int dong1, int dong2) { if((dong1 >= 0 && dong1 < n) && (dong2 >= 0 && dong2 < n)) { for(int j = 0; j < n; j++) { HoanVi(a[dong1][j], a[dong2][j]); } } } int main() { int a[MAX][MAX], n, dong1, dong2; NhapMaTran(a,n); XuatMaTran(a,n); do { printf("\nNhap dong 1: "); scanf("%d", &dong1); if(dong1 < 0 || dong1 >= n) { printf("\nDong khong hop le. Xin Nhap lai!"); } }while(dong1 < 0 || dong1 >= n); do { printf("\nNhap dong 2: "); scanf("%d", &dong2); if(dong2 < 0 || dong2 >= n) { printf("\nDong khong hop le. Xin Nhap lai!"); } }while(dong2 < 0 || dong2 >= n); HoanVi2Dong(a, n, dong1, dong2); printf("\nMa tran sau khi hoan vi dong %d va dong %d \n", dong1, dong2); XuatMaTran(a, n); getch(); return 0; }
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