Branch mbo

.gitignore

@@ -1 +1,2 @@
 tests.out
+test_prg

src/Makefile

@@ -0,0 +1,12 @@
+output: main.o isogram.o
+	gcc main.o isogram.o -o isogram
+
+main.o: main.c
+	gcc -c main.c -o main.o
+
+isogram.o: isogram.c isogram.h
+	gcc -c isogram.c
+
+clean:
+	rm -rf main.o isogram.o isogram
+

src/isogram.c

@@ -6,9 +6,23 @@
 
 
 bool is_isogram(const char phrase[]){
-    // this is the documentation
-    if (false) {
-        printf("hello world\n");
+    int i = 0;
+    int freq[256] = {0};
+    while (phrase[i] != '\0'){
+        char c = phrase[i];
+        freq[c]++;
+        i++;
+    }
+    int max = 0;
+    for (int i = 0; i < 256 ; i++){
+        if (freq[i] != 0) {
+        // first time?
+            if (max == 0){
+                max = freq[i]; // keep track of the real frequenz
+            } else if (freq[i] != max){
+                return false;
+            }
+        }
     }
     return true;
 }

src/main.c

@@ -0,0 +1,11 @@
+#include "isogram.h"
+#include <stdio.h>
+
+int main(int arg, char *argv[]){
+    if (is_isogram(argv[1])){
+        printf("The Pharse is an isogram.\n");
+    }else {
+        printf("The pharse is not an isogram.\n");
+    }
+    return 0;
+}

src/test.c

@@ -0,0 +1,31 @@
+#define UNITY_OUTPUT_COLOR
+
+#include "isogram.h"
+#include <string.h>
+#include <stdio.h>
+
+
+bool is_isogram(const char phrase[]){
+
+    int i = 0;
+    int freq[256] = {0};
+
+    while(phrase[i] != '\0'){
+        char c = phrase[i];
+        freq[c]++;
+        i++;
+    }
+    int max = 0;
+    for (int i = 0; i<256; i++) {
+        if (freq[i] != 0) {
+            //first time
+            if(max == 0) {
+                max = freq[i];
+            } else if(freq[i] != max) {
+                return false;
+            }
+    }
+}
+
+    return true;
+}