draft

programs/p42/main.c

@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main(void) {
+    int a, b, i, ans;
+
+    printf("Input upper limit: ");
+    (void)scanf("%d", &a);
+    printf("Input lower limit: ");
+    (void)scanf("%d", &b);
+
+    i = b;
+    ans = 0;
+
+    do {
+        ans += i++;
+    } while (i <= a);
+
+    printf("Sum of all integer between %d and %d is %d.\n", b, a, ans);
+
+    return 0;
+}