Add solved exercises

2 files changed, 25 insertions, 0 deletions

diff --git a/c/pangram/src/pangram.c b/c/pangram/src/pangram.c
new file mode 100644
index 0000000..d23ed9d
--- /dev/null
+++ b/c/pangram/src/pangram.c
@@ -0,0 +1,17 @@
+#include "pangram.h"
+#include <ctype.h>
+#include <string.h>
+
+bool is_pangram(const char *sentence) {
+    if (sentence == NULL) return false;
+
+    bool seen[26] = {0};
+    for (size_t idx = 0; sentence[idx] != '\0'; idx++) {
+        unsigned char cur = tolower((unsigned char) sentence[idx]);
+        if ('a' <= cur & cur <= 'z') seen[cur - 'a'] = true;
+    }
+
+    for (short idx = 0; idx < 26; idx++)
+        if (!seen[idx]) return false;
+    return true;
+}
diff --git a/c/pangram/src/pangram.h b/c/pangram/src/pangram.h
new file mode 100644
index 0000000..e95d685
--- /dev/null
+++ b/c/pangram/src/pangram.h
@@ -0,0 +1,8 @@
+#ifndef PANGRAM_H
+#define PANGRAM_H
+
+#include <stdbool.h>
+
+bool is_pangram(const char *sentence);
+
+#endif