C

Author: saky-semicolon

Arithmetic Problems/powers.c

@@ -0,0 +1,19 @@
+// First Three Powers (N^1, N^2, N^3) Without Using Power Function
+
+/*
+    Explanation:
+        N = N;
+        N^2 = N*N;
+        N^3 = N*N*N;
+        N^4 = N*N*N*N;
+*/
+#include<stdio.h>
+int main()
+{
+    int num;
+    printf("Please enter the number: ");
+    scanf("%d", &num);
+
+    printf("The three first numbers: %d, %d and %d\n", num, num*num, num*num*num);
+    return 0;
+}

Arithmetic Problems/powers.exe

@@ -0,0 +1,19 @@
+// First Three Powers (N^1, N^2, N^3) Using Power Function
+/*
+    Power Function:
+    pow(var, power) e.g., pow(num, 2)
+*/
+#include<stdio.h>
+int main()
+{
+    int a, b, c, num;
+    printf("Please enter the number: ");
+    scanf("%d", &num);
+
+    a = pow(num, 1);
+    b = pow(num, 2);
+    c = pow(num, 3);
+
+    printf("The three first numbers: %d, %d and %d\n", a, b, c);
+    return 0;
+}

Arithmetic Problems/powers_function.c

@@ -0,0 +1,98 @@
+// Check whether the a date is valid or not.
+/*
+    Condition:
+        Date:   1<= date <= 31;
+        Month:  1<= month <= 12;
+        Year:   1<= year <=12
+
+    Note:
+        If the year is a leap year then February month will  be 29. Otherwise 28.
+        If the
+*/
+
+
+#include<stdio.h>
+#include<conio.h>
+void main()
+{
+    int d,m,y,i,leap=0,temp=0,temp1=0,temp2=0;
+
+    printf("C Program to Date Validation");
+    
+    while(1)
+    {
+    printf("\n\nEnter The Date (dd mm yyyy) : ");
+    scanf(" %d %d %d",&d,&m,&y);
+
+    if(y<1600||y>2100)
+    {
+     printf("\nYear Is Not Valid !!!! Try Again");
+     temp=1;
+    }
+    else
+    {
+     printf("\nYear Is Valid ");
+    }
+
+    if(temp!=1)
+    {
+     if(y%4==0)
+      leap=1;
+    }
+
+    if(m<1||m>12)
+    {
+     printf("\nMonth Is Not Valid !!!! Try Again");
+    }
+    else
+    {
+     printf("\nMonth Is Valid ");
+    }
+
+    if(d<1||d>31)
+    {
+     temp2=1;
+    }
+
+    if(m>=1&&m<=7)
+    {
+     for(i=1;i<=6;i++)
+     {
+        if(m%2==0)
+         temp1=30;
+        if(m%2==1)
+         temp1=31;
+     }
+    }
+
+    if(leap==0&&m==2)
+    {
+  temp1=28;
+ }
+
+    if(leap==1&&m==2)
+    {
+  temp1=29;
+ }
+
+    if(m>=8&&m<=12)
+    {
+     for(i=7;i<=12;i++)
+     {
+        if(m%2==0)
+         temp1=31;
+        if(m%2==1)
+         temp1=30;
+     }
+    }
+    if(d>temp1)
+     temp2=1;
+    if(temp2==1)
+     printf("\nDate Is Not Valid !!!!! Try Again");
+    if(temp2==0)
+     printf("\nDate Is Valid ");
+
+ printf("\n\n\nPress Enter For Again Check Date Validity \n");
+    getch();
+ }
+}

Arithmetic Problems/powers_function.exe

@@ -0,0 +1,28 @@
+// Check you are elligible for voting or not.
+
+#include<stdio.h>
+int main()
+{
+    int BirthYear, PresentYear, Age, wait;
+    PresentYear = 2023;
+    printf("Enter your Birthyear: ");
+    scanf("%d", &BirthYear);
+    
+    Age= PresentYear - BirthYear;
+
+    if(Age>=18 && Age<100)
+    {
+        printf("You are eligible to vote!\n");
+    }
+    else if(Age>100)
+    {
+        printf("You are eligible but we prefer to take rest at home!\n");
+    }
+    else
+    {
+        wait = 18 - Age;
+        printf("Sorry,you are not eligible to vote!\nPlease wait %d years to vote!\n", wait);
+    }
+    return 0;
+
+}

If_Else Statements/date_month_year_validity_check.c

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+// Calculate whether a year is a leap year or not!
+/*
+    Condition:
+    The year should be divisible by 4 AND year % 100 != 0.
+    Year % 400 = 0
+
+    Syntax: ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)
+*/
+
+#include<stdio.h>
+int main()
+{
+    int year;
+    printf("Please enter year: ");
+    scanf("%d", &year);
+
+    if(year % 4 == 0 && year % 100 != 0 || year % 400 == 0) 
+    {
+        printf("%d is a leap year!\n", year);
+    }
+    else
+    {
+        printf("%d is not a leap year!\n", year);
+    }
+    return 0;
+}
+
+
+
+