array-in-a-matrix/hamming-code
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error detection (need 2 isolate error cord & fix)

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array-in-a-matrix 2021-07-06 03:51:50 -04:00
parent 5323e2353a
commit 4c88e91128
1 changed files with 142 additions and 25 deletions
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167
index.c
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@ -6,14 +6,21 @@
#define LOWER 0
#define UPPER 3
void print_matrix(int matrix[GRID_SIZE][GRID_SIZE]);
int random_number(int lower, int upper);
void print_matrix(int matrix[GRID_SIZE][GRID_SIZE]);
void induce_noise(int matrix[GRID_SIZE][GRID_SIZE]);
void parity_check_1(int matrix[GRID_SIZE][GRID_SIZE]);
void parity_check_2(int matrix[GRID_SIZE][GRID_SIZE]);
void parity_check_3(int matrix[GRID_SIZE][GRID_SIZE]);
void parity_check_4(int matrix[GRID_SIZE][GRID_SIZE]);
void error_check_1(int matrix[GRID_SIZE][GRID_SIZE]);
void error_check_2(int matrix[GRID_SIZE][GRID_SIZE]);
void error_check_3(int matrix[GRID_SIZE][GRID_SIZE]);
void error_check_4(int matrix[GRID_SIZE][GRID_SIZE]);
int main()
{
srand(time(0));
@ -25,26 +32,33 @@ int main()
{1, 0, 1, 1}};
print_matrix(message);
printf("\n");
parity_check_1(message);
printf("\n");
print_matrix(message);
printf("\n");
parity_check_2(message);
printf("\n");
print_matrix(message);
printf("\n");
parity_check_3(message);
printf("\n");
print_matrix(message);
printf("\n");
parity_check_4(message);
printf("\n");
print_matrix(message);
printf("\n");
printf("\n");
printf("Message now corrupt!\n");
induce_noise(message);
print_matrix(message);
printf("\n");
printf("\n");
error_check_1(message);
error_check_2(message);
error_check_3(message);
error_check_4(message);
return 0;
};
int random_number(int lower, int upper)
{
int num = (rand() % (upper - lower + 1)) + lower;
return num;
};
void print_matrix(int matrix[GRID_SIZE][GRID_SIZE])
{
for (int i = 0; i < GRID_SIZE; i++)
@ -57,12 +71,6 @@ void print_matrix(int matrix[GRID_SIZE][GRID_SIZE])
}
};
int random_number(int lower, int upper)
{
int num = (rand() % (upper - lower + 1)) + lower;
return num;
};
void induce_noise(int matrix[GRID_SIZE][GRID_SIZE])
{
int random_X = random_number(LOWER, UPPER);
@ -81,6 +89,7 @@ void induce_noise(int matrix[GRID_SIZE][GRID_SIZE])
};
};
void parity_check_1(int matrix[GRID_SIZE][GRID_SIZE])
{
int counter = 0;
@ -106,12 +115,10 @@ void parity_check_1(int matrix[GRID_SIZE][GRID_SIZE])
if ((counter % 2) == 0)
{
printf("even number of 1s\n");
matrix[0][1] = 0;
}
else
{
printf("odd number of 1s\n");
matrix[0][1] = 1;
};
};
@ -141,12 +148,10 @@ void parity_check_2(int matrix[GRID_SIZE][GRID_SIZE])
if ((counter % 2) == 0)
{
printf("even number of 1s\n");
matrix[0][2] = 0;
}
else
{
printf("odd number of 1s\n");
matrix[0][2] = 1;
};
};
@ -176,12 +181,10 @@ void parity_check_3(int matrix[GRID_SIZE][GRID_SIZE])
if ((counter % 2) == 0)
{
printf("even number of 1s\n");
matrix[1][0] = 0;
}
else
{
printf("odd number of 1s\n");
matrix[1][0] = 1;
};
};
@ -211,12 +214,126 @@ void parity_check_4(int matrix[GRID_SIZE][GRID_SIZE])
if ((counter % 2) == 0)
{
printf("even number of 1s\n");
matrix[2][0] = 0;
}
else
{
printf("odd number of 1s\n");
matrix[2][0] = 1;
};
};
void error_check_1(int matrix[GRID_SIZE][GRID_SIZE]){
int counter = 0;
int col_1[GRID_SIZE], col_3[GRID_SIZE];
for (int i = 0; i < GRID_SIZE; i++)
{
col_1[i] = matrix[i][1];
col_3[i] = matrix[i][3];
};
for (int i = 0; i < GRID_SIZE; i++)
{
if (col_1[i] == 1)
{
counter++;
};
if (col_3[i] == 1)
{
counter++;
};
};
if((counter % 2) != 0){
printf("Error in col 1 or col 3\n");
}else{
printf("Message is unharmed.\n");
};
};
void error_check_2(int matrix[GRID_SIZE][GRID_SIZE]){
int counter = 0;
int col_2[GRID_SIZE], col_3[GRID_SIZE];
for (int i = 0; i < GRID_SIZE; i++)
{
col_2[i] = matrix[i][2];
col_3[i] = matrix[i][3];
};
for (int i = 0; i < GRID_SIZE; i++)
{
if (col_2[i] == 1)
{
counter++;
};
if (col_3[i] == 1)
{
counter++;
};
};
if((counter % 2) != 0){
printf("Error in col 2 or col 3\n");
}else{
printf("Message is unharmed.\n");
};
};
void error_check_3(int matrix[GRID_SIZE][GRID_SIZE]){
int counter = 0;
int row_1[GRID_SIZE], row_3[GRID_SIZE];
for (int i = 0; i < GRID_SIZE; i++)
{
row_1[i] = matrix[1][i];
row_3[i] = matrix[3][i];
};
for (int i = 0; i < GRID_SIZE; i++)
{
if (row_1[i] == 1)
{
counter++;
};
if (row_3[i] == 1)
{
counter++;
};
};
if((counter % 2) != 0){
printf("Error in row 1 or row 3\n");
}else{
printf("Message is unharmed.\n");
};
};
void error_check_4(int matrix[GRID_SIZE][GRID_SIZE]){
int counter = 0;
int row_2[GRID_SIZE], row_3[GRID_SIZE];
for (int i = 0; i < GRID_SIZE; i++)
{
row_2[i] = matrix[2][i];
row_3[i] = matrix[3][i];
};
for (int i = 0; i < GRID_SIZE; i++)
{
if (row_2[i] == 1)
{
counter++;
};
if (row_3[i] == 1)
{
counter++;
};
};
if((counter % 2) != 0){
printf("Error in row 2 or row 3\n");
}else{
printf("Message is unharmed.\n");
};
};