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C programs QnA

Q. If sum of two integer is 14 and if one of them is 8 then find other integer. Ans: Well, this is very simple. Simply, one integer is 8 and sum of two integers is 14. So, we need to subtract the number 8 from their sum of 14 to get the second number. So, the second number is: 14 - 8 = 6 C-Program of this task Code---> #include<stdio.h> int main () { int num1 = 8 , num2 , sum = 14 ; num2 = sum - num1 ; printf ( "The second number is: %d" , num2 ); return 0 ; }
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C program to make a calculator



In this C-program we will make a calculator.

input:

Your choice of calculation(i.e : multiplication,division etc.) and the numbers you want to calculate.

output:

The Calculator made by you with the result you calculated.

CODE---->


#include<stdio.h>
#include<stdlib.h>
int main()
{
 float a[50],b,d,sum=0.0,sub,mul=1.0,div;
 int k,n,i;
 printf("***********Welcome to calculator************\n\n");
 printf("Please, choose any operation:\n");
 printf("1.Sum\n2.Subtraction\n3.Multiplication\n4.Division\n5.Exit\nYour choice: ");
 scanf("%d",&n);
 switch(n)
 {
  case 1:
   printf("\nPlease, Enter how many numbers you want to add: ");
   scanf("%d",&k);
   printf("\nPlease, Enter numbers:\n");
   for(i=1;i<=k;i++)
   {
    scanf("%f",&a[i]);
    sum=sum+a[i];
   }
   printf("\nThe sum of the numbers is: %f",sum);
   break;
  case 2:
   printf("\nPlease, Enter the 1st number: ");
   scanf("%f",&b);
   printf("Please, Enter the 2nd number: ");
   scanf("%f",&d);
   sub=b-d;
   printf("\nThe subtraction result is: %f",sub);
   break;
  case 3:
   printf("\nPlease, Enter how many numbers you want to multiply: \n");
   scanf("%d",&k);
   printf("\nPlease, Enter numbers:\n");
   for(i=1;i<=k;i++)
    scanf("%f",&a[i]);
   for(i=1;i<=k;i++)
    mul=mul*a[i];
   printf("\nThe multiplication of the numbers is: %f",mul);
   break;
  case 4:
   printf("\nPlease, Enter the 1st number: ");
   scanf("%f",&b);
   printf("\nPlease, Enter the 2nd number: ");
   scanf("%f",&d);
   div=b/d;
   printf("\nThe division result is: %f",div);
   break;
  case 5:
   exit(0);
  default: printf("SORRY, Wrong choice !!!");
 }
 return 0;
}

Download the C-Program file of this Program.



Don't just read, write it, run it.....

RESULT:


set 1
***********Welcome to calculator************

Please, choose any operation:
1.Sum
2.Subtraction
3.Multiplication
4.Division
5.Exit
Your choice: 1

Please, Enter how many numbers you want to add: 6

Please, Enter numbers:
19
436
90.84
1.3
74
-9

The sum of the numbers is: 612.139954
--------------------------------
Process exited after 28.39 seconds with return value 0
Press any key to continue . . .


set 2
***********Welcome to calculator************

Please, choose any operation:
1.Sum
2.Subtraction
3.Multiplication
4.Division
5.Exit
Your choice: 2

Please, Enter the 1st number: 190
Please, Enter the 2nd number: 9.876

The subtraction result is: 180.123993
--------------------------------
Process exited after 12.52 seconds with return value 0
Press any key to continue . . .


set 3
***********Welcome to calculator************

Please, choose any operation:
1.Sum
2.Subtraction
3.Multiplication
4.Division
5.Exit
Your choice: 3

Please, Enter how many numbers you want to multiply:
5

Please, Enter numbers:
1
2
3
4
5

The multiplication of the numbers is: 120.000000
--------------------------------
Process exited after 10.52 seconds with return value 0
Press any key to continue . . .


set 4
***********Welcome to calculator************

Please, choose any operation:
1.Sum
2.Subtraction
3.Multiplication
4.Division
5.Exit
Your choice: 4

Please, Enter the 1st number: 198

Please, Enter the 2nd number: 3

The division result is: 66.000000
--------------------------------
Process exited after 12.9 seconds with return value 0
Press any key to continue . . .


Images for better understanding:



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