slightly scuffed but dw about it

mafs.c

@@ -0,0 +1,65 @@
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+
+int ask_int_input(void) {
+  int a;
+  int result;
+
+  while (1) {
+    printf("Enter a number: ");
+    result = scanf("%d", &a);
+    if (result == 1) {
+      break;
+    } else {
+      printf("Input is not of type int. Try again\n");
+      while (getchar() != '\n')
+        ;
+    };
+  };
+
+  return a;
+}
+
+int is_odd(int x) { return x % 2 == 0; }
+
+int odd_or_even(void) {
+  int i = ask_int_input();
+
+  if (is_odd(i) == 1) {
+    printf("Number is even");
+  } else {
+    printf("Number is odd");
+  };
+
+  return 0;
+}
+
+float ball_vol() {
+  double pi = 3.1415;
+  int a = ask_int_input();
+  double r = sqrt(a / (4 * pi));
+  double vol = 4 / 3 * pi * pow(r, 3);
+  printf("The volume of the ball is: %f\n", vol);
+  return vol;
+}
+
+int main(int argc, char **argv) {
+  if (argc < 2) {
+    printf("Please give at least one argument\n");
+    return 1;
+  };
+  if (argc > 2) {
+    printf("Too many arguments");
+    return 1;
+  };
+  if (strcmp("help", argv[1]) == 0) {
+    printf("help command \n");
+    return 0;
+  } else {
+    ball_vol();
+    odd_or_even();
+  };
+
+  return 0;
+}