Data commit

Task/Middle-three-digits/C/middle-three-digits-1.c

@@ -0,0 +1,32 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+// we return a static buffer; caller wants it, caller copies it
+char * mid3(int n)
+{
+	static char buf[32];
+	int l;
+	sprintf(buf, "%d", n > 0 ? n : -n);
+	l = strlen(buf);
+	if (l < 3 || !(l & 1)) return 0;
+	l = l / 2 - 1;
+	buf[l + 3] = 0;
+	return buf + l;
+}
+
+int main(void)
+{
+	int x[] = {123, 12345, 1234567, 987654321, 10001, -10001,
+		-123, -100, 100, -12345, 1, 2, -1, -10, 2002, -2002, 0,
+		1234567890};
+
+	int i;
+	char *m;
+	for (i = 0; i < sizeof(x)/sizeof(x[0]); i++) {
+		if (!(m = mid3(x[i])))
+			m = "error";
+		printf("%d: %s\n", x[i], m);
+	}
+	return 0;
+}

Task/Middle-three-digits/C/middle-three-digits-2.c

@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void midThree(char arg[])
+{
+    char output[4];
+    int midPoint;
+    arg[0]=='-'?midPoint = ((strlen(arg) + 1) / 2):midPoint = ((strlen(arg) + 1) / 2) - 1;
+
+    if(strlen(arg) < 3)
+        {
+            printf("Error, %d is too short.\n",atoi(arg));
+            return ;
+        }
+        else if(strlen(arg)  == 4 || strlen(arg) == 3)
+        {
+            printf("Error, %d has %d digits, no 3 middle digits.\n",atoi(arg),arg[0]=='-'?strlen(arg)-1:strlen(arg));
+            return ;
+        }
+    else{
+    for(int i=0; i<3; i++)
+    {
+        output[i] = arg[(midPoint-1) + i];
+    }
+    output[3] = '\0';
+    printf("The middle three digits of %s are %s.\n",arg,output);
+}}
+
+int main(int argc, char * argv[])
+{
+    char input[50];
+    int x[] = {123, 12345, 1234567, 987654321, 10001, -10001,
+		-123, -100, 100, -12345, 1, 2, -1, -10, 2002, -2002, 0,
+		1234567890},i;
+		
+    if(argc < 2)
+    {
+        printf("Usage: %s <integer>\n",argv[0]);
+        printf("Examples with preloaded data shown below :\n");
+
+        for(i=0;i<18;i++)
+        {
+	        midThree(itoa(x[i],argv[0],10));
+	     }
+        return 1;
+    }
+    else
+    {
+        sprintf(input,"%d",atoi(argv[1]));
+            midThree(argv[1]);
+            return 0;
+
+
+    }
+}