1 files changed, 71 insertions, 0 deletions
diff --git a/c/dataStructure/baseConversion.c b/c/dataStructure/baseConversion.c
new file mode 100755
index 0000000..8f7bd46
--- /dev/null
+++ b/c/dataStructure/baseConversion.c
@@ -0,0 +1,71 @@
+// default base is decimal to binary
+// run program with flag to start with different base
+
+#include<stdio.h>
+#include<stdlib.h>
+
+typedef struct stack {
+    int * base;
+    int top;
+    int size;
+} Stack;
+
+void getSpace(Stack * s)
+{
+    if (s->size == 0)
+    {
+        s->size = 1;
+        s->base = (int *) calloc (s->size,sizeof(int));
+    }
+    else
+    {
+        s->size += 1;
+        s->base = (int *) realloc (s->base, sizeof(int) * s->size);
+    }
+}
+
+void conversion(Stack * s, int from, int to)
+{
+    while (from != 0)
+    {
+        if (s->size <= s->top)
+            getSpace(s);
+        s->base[s->top++] = from % to;
+        from /= to;
+    }
+}
+
+void print(Stack * s, int from)
+{
+    printf("origin\t\tbinary\n");
+    printf("%d\t\t",from);
+    while (s->top != 0)
+        printf("%d",s->base[--s->top]);
+    s->top = 0;
+    putchar('\n');
+}
+
+int getNumber(void)
+{
+    int tmp;
+
+    if (scanf("%d", &tmp) != 1)
+        exit(EXIT_SUCCESS);
+    return tmp;
+}
+
+int main(void)
+{
+    Stack storage = {NULL, 0, 0};
+
+    int from = getNumber();
+    int to = 2;
+
+    conversion(&storage,from,to);
+
+    print(&storage,from);
+
+    free(storage.base);
+
+    return 0;
+}