Conditional C programming

• Three numbers are input through keyboard.Write a program to find out the maximum and minimum of those 3 numbers.
  
  #include<stdio.h>
  #include<conio.h>
  void main()
  {
  clrscr();
  int a,b,c;
  printf("Enter value of a?\n");
  scanf("%d",&a);
  printf("Enter value of b?\n");
  scanf("%d",&b);
  printf("Enter value of c?\n");
  scanf("%d",&c);
  
  if(a>b&&a>c)
      printf("\n Max a");
  if(b>a&&b>c)
      printf("\n Max b");
  if(c>a&&c>b)
      printf("\n Max c");
  if(a<b&&a<c)
      printf("\n\n Min a");
  if(b<a&&b<c)
      printf("\n\n Min b");
  if(c<a&&c<b)
      printf("\n\n Min c");
  getch();
  }

• Take  a year as input and determine whether  it is leap year.
  
  #include<stdio.h>
  #include<conio.h>
  void main()
  {
  clrscr();
  int year;
  printf("Enter a year to check for a leap year:");
  
  scanf("%d",&year);
  
  if((year%4==0 && year%100!=0)||(year%400==0))
  
       {
       printf("The entered year is a leap year.");
        }
  else
      {
       printf("The entered year is not a leap year.");
       }
  getch();
       }
• If  cost price and selling price of an  item is input  through the  keyboard, write a program to determine  whether the seller has made profit  or incurred loss.Also determine  how much profit  he made or loss he incurred.
  #include<stdio.h>
  #include<conio.h>
  void main()
  {
  clrscr();
  int x,y,sum;
  printf("Enter cost price x?\n");
  scanf("%d",&x);
  printf("Enter selling price y?\n");
  scanf("%d",&y);
  
  if(x<y)
      {
      printf("The seller has made profit");
      sum=y-x;
      printf("\nThe profit is:%d",sum);
      }
  else
      {
      printf("The seller has incurred loss");
      sum=x-y;
      printf("\nThe loss is:%d",sum);
      }
  getch();
  }
• Any  integer  is  input  through  keyboard. Write a program to find out  whether it is an odd number  or  even number.
  #include<stdio.h>
  #include<conio.h>
  void main()
  {
  clrscr();
  int num;
  printf("Enter a num:");
  scanf("%d",&num);
  
  if(num%2==0)
       printf("The occured number is even.");
  else
       printf("The occured number is odd.");
  getch();
  }
• A  5 digit number is entered through the keyboard. Write a program to obtain the reverse number and  to determine whether  the  original  numbers are  equal  or  not.
  #include<stdio.h>
  #include<conio.h>
  void main()
  {
  clrscr();
  long int num,num1,rem,numb=0;
  
  printf("Enter the 5 digit number ?\n");
  scanf("%ld",&num);
  rem=num%10;
  numb=numb+(10000*rem);
  num1=num/10;
  rem=num1%10;
  numb=numb+(1000*rem);
  num1=num1/10;
  rem=num1%10;
  numb=numb+(100*rem);
  num1=num1/10;
  rem=num1%10;
  numb=numb+(10*rem);
  num1=num1/10;
  numb=numb+num1;
  printf("\nThe reverse number of this number is:%ld",numb);
  numb;
  if(numb==num)
      printf("\n\nThe numbers are equal");
  else
      printf("\n\nThe numbers are not equal");
  getch();
  }
• Aust  grading  policy  is:
  1. 80%  marks or above  is A+
  2. 75% to 79% marks is A
  3. 70% to 74% marks is A-
  4. 65% to 69% marks is B+
  5. 60% to 64% marks is B
  6. 55% to 59% marks is B-
  7. 50% to 54% marks is C+
  8. 45% to 49% marks is C
  9. 40% to 44% marks is D
  10. Below 40% is F
      
      Write  aprogram which will take an input from user and calculate the grade of a student according to Aust  grading policy based on that input. 
      #include<stdio.h>
      #include<conio.h>
      void main()
      {
      clrscr();
      int x;
      printf("Enter a mark:");
      scanf("%d",&x);
      if(x>=80)
      printf("The grade is:A+");
      else if(x>=75&&x<=79)
      printf("The grade is:A");
      else if(x>=70&&x<=74)
      printf("The grade is:A-");
      else if(x>=65&&x<=69)
      printf("The grade is:B+");
      else if(x>=60&&x<=64)
      printf("The grade is:B");
      else if(x>=55&&x<=59)
      printf("The grade is:B-");
      else if(x>=50&&x<=54)
      printf("The grade is:c+");
      else if(x>=45&&x<=49)
      printf("The grade is:c");
      else if(x>=40&&x<=44)
      printf("The grade is:c");
      else if(x<40)
      printf("The grade is:F");
      getch();
      }
      • A certain grade of steel is graded according to the following conditions:
        
        1.Hardness must be greater than 60
        2.Certain content must be less than 0.7
        3.Tensile strength must be greater than 5000
        
        
        The grades are as follow:
        
        
        Grade is 10 if all three conditions are met
        Grade is 9 if condition 1 and 2 are met
        Grade is 8 if condition 2 and 3 are met
        Grade is 7 if condition 1 and 3 are met
        Grade is 6 if only one condition is met
        Grade is 5 if one of the conditions are met
         Write a program which will require the user   give values of hardness, carbon content and tensile  strength  of  the steel   under consideration and output   the  grade  of the steel.
        
        
        #include<stdio.h>
        #include<conio.h>
        void main()
        {
        clrscr();
        
        int x,z;
        float y;
        printf("Enter the value of hardness?\n");
        scanf("%d",&x);
        printf("carbon content?\n");
        scanf("%f",&y);
        printf("Enter tensile strength?\n");
        scanf("%d",&z);
        if (x>60&&y<0.7&&z>5000)
            printf("Grade is 10");
        else if(x>60&&y<0.7)
            printf("Grade is 9");
        else if(y<0.7&&z>5000)
            printf("Grade is 8");
        else if(x>60&&z>5000)
            printf("Grade is 7");
        else if(x>60||y<0.7||z>5000)
            printf("Grade is 6");
        else
            printf("Grade is 5");
        getch();
        }