ADD file via upload

function.4.cpp

@@ -0,0 +1,86 @@
+#include<stdio.h>
+int main(){
+	int board[9][9] = {{8, 3, 0, 0, 7, 0, 0, 0, 0},
+{6, 0, 0, 1, 9, 5, 0, 0, 0},
+{0, 9, 8, 0, 0, 0, 0, 6, 0},
+{8, 0, 0, 0, 6, 0, 0, 0, 3},
+{4, 0, 0, 8, 0, 3, 0, 0, 1},
+{7, 0, 0, 0, 2, 0, 0, 0, 6},
+{0, 6, 0, 0, 0, 0, 2, 8, 0},
+{0, 0, 0, 4, 1, 9, 0, 0, 5},
+{0, 0, 0, 0, 8, 0, 0, 7, 9}};
+	printf("The original Sudoku matrix: \n");
+	for(int i=0;i<9;i++){
+		if(i%3==0){
+			printf("-------------\n");
+		}
+		for(int j=0;j<9;j++){
+			if(j%3==0||j==9){
+				printf("|");
+			}
+			printf("%d",board[i][j]);
+		}
+		printf("|\n");
+	}printf("-------------\n");
+	
+	int useful=1;
+	int a[10];
+	for(int r=0;r<9&&useful;r++){
+		for(int k=0;k<10;k++)
+			a[k]=0;
+		for(int c=0;c<9;c++){
+		
+		if(board[r][c]!=0){
+			if(a[board[r][c]]==1){
+				printf("False:Invalid initial Sudoku matrix!\n");
+				printf("The number %d in the row %d has been used!",board[r][c],r+1);
+				useful=0;
+				break;
+			}
+			a[board[r][c]]==1;
+		}
+	}
+	
+}
+	for(int c=0;c<9&&useful;c++){
+		for(int k=0;k<10;k++)
+		a[k]=0;
+		for(int r=0;r<9;r++){
+			if(board[r][c]!=0){
+			if(a[board[r][c]]==1){
+				printf("False:Invalid initial Sudoku matrix!\n");
+				printf("The number %d in the col %d has been used!",board[r][c],c+1);
+				useful=0;
+				break;
+			}
+			a[board[r][c]]=1;
+		}
+	}
+}
+	for(int bigr=0;bigr<9&&useful;bigr+=3){
+		for(int bigc=0;bigc<9&&useful;bigc+=3){
+			for(int k=0;k<10;k++)
+			a[k]=0;
+			for(int r=0;r<3;r++){
+				for(int c=0;c<3;c++){
+					int x=board[bigr+r][bigc+c];
+					if(x!=0){
+						if(a[x]==1){
+							printf("False:Invalid initial Sudoku matrix!\n");
+							printf("The number %d in the block %d has been used!",bigr+r+1,x);
+							useful=0;
+							goto end;
+						}
+						a[x]=1;
+					}
+				}
+			}
+		}
+	}
+	if(useful){
+	
+	printf("True:Valid initial Sudoku matrix!\n");
+}
+end:
+	return 0;
+}