Data commit

Task/Abbreviations-automatic/C/abbreviations-automatic.c

@@ -0,0 +1,95 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void process(int lineNum, char buffer[]) {
+    char days[7][64];
+    int i = 0, d = 0, j = 0;
+
+    while (buffer[i] != 0) {
+        if (buffer[i] == ' ') {
+            days[d][j] = '\0';
+            ++d;
+            j = 0;
+        } else if (buffer[i] == '\n' || buffer[i] == '\r') {
+            days[d][j] = '\0';
+            ++d;
+            break;
+        } else {
+            days[d][j] = buffer[i];
+            ++j;
+        }
+
+        if (d >= 7) {
+            printf("There aren't 7 days in line %d\n", lineNum);
+            return;
+        }
+        ++i;
+    }
+    if (buffer[i] == '\0') {
+        days[d][j] = '\0';
+        ++d;
+    }
+
+    if (d < 7) {
+        printf("There aren't 7 days in line %d\n", lineNum);
+        return;
+    } else {
+        int len = 0;
+
+        for (len = 1; len < 64; ++len) {
+            int d1;
+            for (d1 = 0; d1 < 7; ++d1) {
+                int d2;
+                for (d2 = d1 + 1; d2 < 7; ++d2) {
+                    int unique = 0;
+                    for (i = 0; i < len; ++i) {
+                        if (days[d1][i] != days[d2][i]) {
+                            unique = 1;
+                            break;
+                        }
+                    }
+                    if (!unique) {
+                        goto next_length;
+                    }
+                }
+            }
+
+            // uniqueness found for this length
+            printf("%2d ", len);
+            for (i = 0; i < 7; ++i) {
+                printf(" %s", days[i]);
+            }
+            printf("\n");
+            return;
+
+            // a duplication was found at the current length
+        next_length: {}
+        }
+    }
+
+    printf("Failed to find uniqueness within the bounds.");
+}
+
+int main() {
+    char buffer[1024];
+    int lineNum = 1, len;
+    FILE *fp;
+
+    fp = fopen("days_of_week.txt", "r");
+    while (1) {
+        memset(buffer, 0, sizeof(buffer));
+
+        fgets(buffer, sizeof(buffer), fp);
+        len = strlen(buffer);
+
+        if (len == 0 || buffer[len - 1] == '\0') {
+            break;
+        }
+
+        process(lineNum++, buffer);
+    }
+    fclose(fp);
+
+    return 0;
+}