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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define LINE_SIZE 12
void rotate(char matrix[10][10]) {
int layer = 0;
char temp1;
char temp2;
char temp3;
while (layer <= 10 / 2) {
for (int i = layer; i < 10 - 1 - layer; i++) {
temp1 = matrix[i][10 - 1 - layer];
temp2 = matrix[10 - 1 - layer][10 - 1 - i];
temp3 = matrix[10 - 1 - i][layer];
matrix[i][10 - 1 - layer] = matrix[layer][i];
matrix[10 - 1 - layer][10 - 1 - i] = temp1;
matrix[10 - 1 - i][layer] = temp2;
matrix[layer][i] = temp3;
}
layer++;
}
}
int main(int argc, char **argv) {
if (argc != 2) {
fprintf(stderr, "Usage: rotateMatrix inputFileName\n");
return EXIT_FAILURE;
}
FILE *f = fopen(argv[1], "r");
if (f == NULL) {
fprintf(stderr, "Could not open file\n");
return EXIT_FAILURE;
}
char line[LINE_SIZE];
char matrix[10][10];
int lineNumber = 0;
while (fgets(line, LINE_SIZE, f) != NULL) {
if (lineNumber >= 10) {
fprintf(stderr, "Too many lines!\n");
return EXIT_FAILURE;
}
if (strchr(line, '\n') == NULL) {
fprintf(stderr, "Line is too long!\n");
return EXIT_FAILURE;
}
if ((strchr(line, '\n') - line) != 10) {
fprintf(stderr, "Line is too short!\n");
return EXIT_FAILURE;
}
for (int j = 0; j < 10; j++) {
if (line[j] == '\n') {
fprintf(stderr, "Line is too short!\n");
return EXIT_FAILURE;
}
matrix[lineNumber][j] = line[j];
}
lineNumber++;
}
if (lineNumber != 10) {
fprintf(stderr, "Not enough number of lines\n");
return EXIT_FAILURE;
}
rotate(matrix);
for (int i = 0; i < 10; i++) {
for (int j = 0; j < 10; j++) {
printf("%c", matrix[i][j]);
}
printf("\n");
}
return EXIT_SUCCESS;
}
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