amoeba

Code:

---


#include <stdio.h>
int main()
{
    int num1,num2,num3;
    printf("Enter 3 intergers:");
    scanf("%d", &num1);
    scanf("%d", &num2);
    scanf("%d", &num3);
    if( num1 == num2 == num3 )
      printf("Equal!!");
    else
      printf("Not Equal!!");
    system("pause");
    return 0;
}

---

why can't i get the correct ans?

[QUOTE=amoeba532;987150]

Code:

---


#include <stdio.h>
int main()
{
    int num1,num2,num3;
    printf("Enter 3 intergers:");
    scanf("%d", &num1);
    scanf("%d", &num2);
    scanf("%d", &num3);
    if( num1 == num2 == num3 )
      printf("Equal!!");
    else
      printf("Not Equal!!");
    system("pause");
    return 0;
}

---

the conditional statement is not correct. num1==num2==num3 is the same as: (num1==num2)==num3. (num1==num2) return 0 or 1 for true or false. Whatever (num1==num2) return will be compared with num3. So in effect, you're not comparing num1, num2 and num3 together. You should not group all conditional test together.

okk.thx nimitzhunter

Quote:

---

Originally Posted by amoeba532

okk.thx nimitzhunter

---

Learn how to use "and," by reading this: http://www.cprogramming.com/tutorial/lesson2.html

Then learn how to rock "?:" and then learn how to scan for 3 ints without writing 3 lines.

Here you go, chew on this and see if you can learn more.

Code:

---

#include <stdio.h>
int main(void){
  int one, two, three;
  printf("Enter 3 ints seperated by spaces:");
  scanf("%d %d %d", &one, &two, &three);
  ((one == two) && (two == three)) ? printf("Equal\n") : printf("Not Equal\n");
  return 0;
}

---

Short, sweet and to the point.

edited: gave main a return value.

Quote:

---

Originally Posted by tenchu

Learn how to use "and," by reading this: Cprogramming.com Tutorial: If Statements

Then learn how to rock "?:" and then learn how to scan for 3 ints without writing 3 lines.

Here you go, chew on this and see if you can learn more.

Code:

---

#include <stdio.h>
void main(void){
  int one, two, three;
  printf("Enter 3 ints seperated by spaces:");
  scanf("%d %d %d", &one, &two, &three);
  ((one == two) && (two == three)) ? printf("Equal\n") : printf("Not Equal\n");
}

---

Short, sweet and to the point.

---

Some compiler may protest "void main()". Standard practice is "int main()"

True, but I was keeping the example short and sweet with a focus on the question/point about comparison operators. I edited the original in case it causes confusion.

If you really want to use the ternary operator, I suggest:

Code:

---

#include <stdio.h>

int main(void) {
    int one, two, three;
    printf("Enter 3 ints seperated by spaces:");
    scanf("%d %d %d", &one, &two, &three);
    puts((one == two && two == three) ? "Equal" : "Not Equal");
    return 0;
}

---

But if you want to have two separate printf or puts statements, then I would consider the if and else branches to be clearer as using the ternary operator then looks like obfuscation to me.

That looks more clear, nice catch!