From 50a27f1d6c5cb17d7e7c47fe98cfe61193ecb585 Mon Sep 17 00:00:00 2001
From: k0rrluna <k0rr.luna1@gmail.com>
Date: Wed, 7 May 2025 14:05:25 +0300
Subject: [PATCH] chapter5

---
 DeitelC/Chapter5/findTheMax.c       | 19 +++++++++++++++++++
 DeitelC/Chapter5/isPerfect.c        | 17 +++++++++++++++++
 DeitelC/Chapter5/isPerfectDemo.c    | 18 ++++++++++++++++++
 DeitelC/Chapter5/lcm.c              | 19 +++++++++++++++++++
 DeitelC/Chapter5/lcmDemo.c          | 11 +++++++++++
 DeitelC/Chapter5/rootsOfQuadratic.c | 26 ++++++++++++++++++++++++++
 DeitelC/Chapter5/sumOfDigits.c      | 18 ++++++++++++++++++
 7 files changed, 128 insertions(+)
 create mode 100644 DeitelC/Chapter5/findTheMax.c
 create mode 100644 DeitelC/Chapter5/isPerfect.c
 create mode 100644 DeitelC/Chapter5/isPerfectDemo.c
 create mode 100644 DeitelC/Chapter5/lcm.c
 create mode 100644 DeitelC/Chapter5/lcmDemo.c
 create mode 100644 DeitelC/Chapter5/rootsOfQuadratic.c
 create mode 100644 DeitelC/Chapter5/sumOfDigits.c

diff --git a/DeitelC/Chapter5/findTheMax.c b/DeitelC/Chapter5/findTheMax.c
new file mode 100644
index 0000000..10e8060
--- /dev/null
+++ b/DeitelC/Chapter5/findTheMax.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int main(void) {
+	float f1, f2, f3, f4;
+	puts("Enter 4 float!");
+	scanf("%f%f%f%f", &f1, &f2, &f3, &f4);
+	float listF[] = {f1, f2, f3, f4};
+
+	float temp;
+	for(int i = 0; i < 3; i++) {
+		if(listF[i] >= listF[i+1]) {
+			temp = listF[i];
+		} else if (listF[i+1] >= listF[i]) {
+			temp = listF[i+1];
+		}
+	}
+	printf("%s%f\n", "Biggest float: ", temp);
+	return 0;
+}
diff --git a/DeitelC/Chapter5/isPerfect.c b/DeitelC/Chapter5/isPerfect.c
new file mode 100644
index 0000000..a8594d4
--- /dev/null
+++ b/DeitelC/Chapter5/isPerfect.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int isPerfect(int);
+
+int isPerfect(int num) {
+	int temp = 0;
+	for(int i = 1; i < num; i++) {
+		if(num % i == 0) {
+			temp += i;
+		}
+	}
+	if (temp == num) {
+		return 1;
+	} else {
+		return 0;
+	}
+}
diff --git a/DeitelC/Chapter5/isPerfectDemo.c b/DeitelC/Chapter5/isPerfectDemo.c
new file mode 100644
index 0000000..25c64bc
--- /dev/null
+++ b/DeitelC/Chapter5/isPerfectDemo.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+#include "isPerfect.c"
+
+int main(void) {
+	/*puts("Enter a int!");
+	int num;
+	scanf("%d", &num);
+
+	printf("%d\n", isPerfect(num));*/
+
+	for(int i = 0; i < 1000; i++) {
+		if(isPerfect(i)) {
+			printf("%d ", i);
+		}
+	}
+	puts("");
+	return 0;
+}
diff --git a/DeitelC/Chapter5/lcm.c b/DeitelC/Chapter5/lcm.c
new file mode 100644
index 0000000..186bf03
--- /dev/null
+++ b/DeitelC/Chapter5/lcm.c
@@ -0,0 +1,19 @@
+#include <stdio.h>
+
+int lcm (int, int);
+
+int lcm (int i1, int i2)
+{
+	int i3 = 0;
+	if (i1 >= i2) {
+		i3 = i1;
+	} else {
+		i3 = i2;
+	}
+	for (int i = 2; i < i3; i++) {
+		if (i1 % i == 0 && i2 % i == 0) {
+			i3 = i;
+		}
+	}
+	return i3;
+}
diff --git a/DeitelC/Chapter5/lcmDemo.c b/DeitelC/Chapter5/lcmDemo.c
new file mode 100644
index 0000000..1c4f36c
--- /dev/null
+++ b/DeitelC/Chapter5/lcmDemo.c
@@ -0,0 +1,11 @@
+#include <stdio.h>
+#include "lcm.c"
+
+int main (void)
+{
+	int i1, i2 = 0;
+	puts("Enter int1 and int 2");
+	scanf("%d%d", &i1, &i2);
+	printf("%s%d\n", "Lowest common integer: ", lcm(i1, i2));
+	return 0;
+}
diff --git a/DeitelC/Chapter5/rootsOfQuadratic.c b/DeitelC/Chapter5/rootsOfQuadratic.c
new file mode 100644
index 0000000..7e95cb1
--- /dev/null
+++ b/DeitelC/Chapter5/rootsOfQuadratic.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <math.h>
+
+void rootsOfQuad(int, int, int);
+
+int main(void) {
+	int a, b, c = 0;
+	puts("Enter coefficients!");
+	scanf("%d%d%d", &a, &b, &c);
+	rootsOfQuad(a, b, c);
+
+	return 0;
+}
+
+
+void rootsOfQuad(int a, int b, int c) {
+	int discriminant = (b * b) - 4 * a * c;
+
+	if(discriminant) {
+		int x1 = (-b - sqrt(discriminant))/2 * a;
+		int x2 = (-b + sqrt(discriminant))/2 * a;
+		printf("%s%d%d\n", "x1 and x2 are: ", x1, x2);
+	} else {
+		puts("Not reel!");
+	}
+}
diff --git a/DeitelC/Chapter5/sumOfDigits.c b/DeitelC/Chapter5/sumOfDigits.c
new file mode 100644
index 0000000..5e1d832
--- /dev/null
+++ b/DeitelC/Chapter5/sumOfDigits.c
@@ -0,0 +1,18 @@
+#include <stdio.h>
+
+int sumOfDigits(int);
+
+int main(void) {
+	int t = 7613;
+	printf("%d\n", sumOfDigits(t));
+	return 0;
+}
+
+int sumOfDigits(int num) {
+	int result = 0;
+	while (num > 0) {
+		result += num % 10;
+		num /= 10;
+	}
+	return result;
+}