Solution code for baekjoon/11655

Author: htcrefactor

strings/baekjoon/11655/solution.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <string.h>
+
+int main(void) {
+    char s[128] = "";
+    gets(s);
+    int s_length = strlen(s);
+
+    char uppercase[26] = "NOPQRSTUVWXYZABCDEFGHIJKLM";
+    char lowercase[26] = "nopqrstuvwxyzabcdefghijklm";
+
+    // Include terminating null character
+    char ret[128] = "";
+
+    for (int index = 0 ; index < s_length ; index++) {
+        // 65: A, 90: Z
+        // 97: a, 122: z
+        int temp = (int)s[index];
+        if (65 <= temp && temp <= 90) {
+            ret[index] = uppercase[temp - 65];
+        } else if (97 <= temp && temp <= 122) {
+            ret[index] = lowercase[temp - 97]; 
+        } else {
+            ret[index] = s[index];
+        }
+
+        printf("%c", ret[index]);
+    }
+
+    return 0;
+}