HELP {PROGRAM}

[JOHN2172000]

Hello everyone . So i tried to make a program that allow the user to select if he wants to add subtract multiply or devide . This is the program :
#include <stdio.h>

int main()
{
int num1, num2, num3, num4, first, second, add, subtract, multiply;
float divide;

printf("Would you like to Add , subtract , multiply or divide?\n ");
printf("Please enter 1 to add , 2 to subtract , 3 to multiply or 4 to divide\n");

scanf("%d,%d,%d,%d", &num1, &num2, &num3, &num4);
if (num1 == 1)
{
// Add = first + second;
}
else if (num1 == 2)
{
// Subtract = first - second;
}
else if (num1 == 3)
{
// Multiply = first * second;
}
else (num1 == 4);
{
// Divide = first / (float)second;
}

printf("Enter two numbers");
scanf("%d%d", &first, &second);

add = first + second;
subtract = first - second;
multiply = first * second;
divide = first / (float)second; //typecasting

printf("Sum = %d\n", add);
printf("Difference = %d\n", subtract);
printf("Multiplication = %d\n", multiply);
printf("Division = %.2f\n", divide);

return 0;
}

Its working well but instead of working on the selection of the user my program give this answer :

Would you like to Add , subtract , multiply or divide?
Please enter 1 to add , 2 to subtract , 3 to multiply or 4 to divide
1 <=== (i pressed 1)
Enter two numbers5 < (then it says to the user to give 2 numbers)
5 < ---( i typed 5 and 5 )
Sum = 10 ( but in the end instead of gving the result of the add)
Difference = 0 ( function , it gives the result for all of them )
Multiplication = 25
Division = 1.00

--------------------------------
Process exited after 2.262 seconds with return value 0
Press any key to continue . . .

Any advice on what should i do so that the program will give only the selected choice to the user is apreciated

[lastchance]

JOHN2172000 wrote:

Its working well

Well, that's a matter of opinion.

You have an if ... else if structure set up, but you don't actually use it; (everything inside is in comments).

When you have gone through that if ... else if structure you do all the operations and then print all the results. Does that seem right?

Maybe you should reorder:
- ask for two numbers;
- ask for the operation;
- put your if ... else if arrangement here and calculate and output the required operation in the right place.


PLEASE USE CODE TAGS.