Add Anagram Checker

test/test3.c

+#include <stdio.h>
+#include <string.h>
+#define STR_LENGTH 200
+ 
+int AnagramCheck(char* fileName);
+ 
+int main(void) {
+    char fileName[10];
+ 
+    memset(fileName, 0, sizeof(fileName));
+    printf("파일 이름 입력 : ");
+    scanf("%s", &fileName);
+ 
+    int chkResult = 0;
+    int existYn = access(fileName, 0);
+ 
+    if (existYn != 0) {
+        printf("해당 파일이 없습니다.");
+        return 0;
+    }
+    else {
+        chkResult = AnagramCheck(fileName);
+ 
+        if (chkResult == 0) {
+            printf("A valid anagram!\n");
+        }
+        else if (chkResult == -1) {
+            printf("Error: Not a valid anagram.\n");
+        }
+        else {
+            printf("Error: The length of the two strings is different.\n");
+        }
+    }
+ 
+    return 0;
+}
+ 
+int AnagramCheck(char* fileName) {
+    FILE* file = NULL;
+    int line = 1;
+    char str1[STR_LENGTH], str2[STR_LENGTH] = { 0, };
+    int arr1[STR_LENGTH] = { 0, };
+    int arr2[STR_LENGTH] = { 0, };
+    int j = 0;
+ 
+    file = fopen(fileName, "r");
+    while (!feof(file)) {
+        if (line == 1) fgets(str1, STR_LENGTH, file);
+        else fgets(str2, STR_LENGTH, file);
+        line++;
+    }
+ 
+    int i;
+    for (i = 0; i < strlen(str1); i++) {
+        if (str1[i] >= 'A' && str1[i] <= 'Z') {
+            str1[i] = str1[i] + 32;
+            j = str1[i];
+            arr1[j]++;
+        }
+        else {
+            if ((str1[i] >= 'a' && str1[i] <= 'z') || (str1[i] >= '0' && str1[i] <= '9')) {
+                j = str1[i];
+                arr1[j]++;
+            }
+        }
+    }
+ 
+    j = 0;
+    for (i = 0; i < strlen(str2); i++) {
+        if (str2[i] >= 'A' && str2[i] <= 'Z') {
+            str2[i] = str2[i] + 32;
+            j = str2[i];
+            arr2[j]++;
+        }
+        else {
+            if ((str2[i] >= 'a' && str2[i] <= 'z') || (str2[i] >= '0' && str2[i] <= '9')) {
+                j = str2[i];
+                arr2[j]++;
+            }
+        }
+    }
+ 
+    int check = 0;
+    int str1len = 0, str2len = 0;
+ 
+    for (i = 0; i < STR_LENGTH; i++) {
+        if (arr1[i] > 0) str1len += arr1[i];
+        if (arr2[i] > 0) str2len += arr2[i];
+    }
+ 
+    if (str1len != str2len) {
+        check = 1;
+    }
+    else {
+        for (i = 0; i < STR_LENGTH; i++) {
+            if (arr1[i] > 0 && arr2[i] > 0) {
+                if (arr1[i] == arr2[i]) break;
+                else {
+                    check = -1;
+                    break;
+                }
+            }
+        }
+    }
+ 
+    fclose(file);
+    return check;
+}
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