new c project

big3.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+void biggest3()
+{
+	int A, B, C;
+
+	printf("\nEnter the numbers A, B and C: ");
+	scanf("%d %d %d", &A, &B, &C);
+
+	// finding max using compound expressions
+	if (A >= B && A >= C)
+		printf("%d is the largest number.\n", A);
+
+	else if (B >= A && B >= C)
+		printf("%d is the largest number.\n", B);
+
+	else
+		printf("%d is the largest number.\n", C);
+
+}
+

fact.c

@@ -0,0 +1,20 @@
+#include <stdio.h>
+void factorial() {
+    int n, i;
+    unsigned long long fact = 1;
+    printf("\n\nEnter an integer: ");
+    scanf("%d", &n);
+
+    // shows error if the user enters a negative integer
+    if (n < 0)
+        printf("Error! Factorial of a negative number doesn't exist.\n");
+    else {
+        for (i = 1; i <= n; ++i) {
+            fact *= i;
+        }
+        printf("Factorial of %d = %llu\n", n, fact);
+    }
+
+    // return 0;
+}
+

main.c

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+main() {
+	biggest3();
+	factorial();
+	pallydrome();
+}	

makefile

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+ABC.exe:main.o big3.o fact.o pal.o
+	gcc -o ABC.exe main.o big3.o fact.o pal.o
+main.o:main.c
+	gcc -c main.c
+big3.o:big3.c
+	gcc -c big3.c
+fact.o:fact.c
+	gcc -c fact.c
+pal.o:pal.c
+	gcc -c pal.c

pal.c

@@ -0,0 +1,22 @@
+#include <stdio.h>
+void pallydrome() {
+  int n, reversed = 0, remainder, original;
+    printf("\nEnter an integer: ");
+    scanf("%d", &n);
+    original = n;
+
+    // reversed integer is stored in reversed variable
+    while (n != 0) {
+        remainder = n % 10;
+        reversed = reversed * 10 + remainder;
+        n /= 10;
+    }
+
+    // palindrome if orignal and reversed are equal
+    if (original == reversed)
+        printf("%d is a palindrome.\n", original);
+    else
+        printf("%d is not a palindrome\n.", original);
+
+   // return 0;
+}