Common Mistakes in C : Scanf Errors

Common Mistakes : Scanf Errors

---

1 : Don’t forget to write “&” before variable name

#include<stdio.h>
void main()
{
int num;
//Incorrect Way : scanf("%d",num); 
scanf("%d",&num);
}

• Syntactically it won’t show any error message
• Logically It shows you “Garbage” or “Unexpected Value”.
• “&” should be written before “Variable” name .

2 : Don’t write “&” before Pointer variable

#include<stdio.h>
void main()
{
int num;
int *ptr;
ptr = #
//Incorrect Way : scanf("%d",&ptr); 
scanf("%d",ptr);
}

• Pointer variable Stores address of variable where it points .
• “&” is used to access “Address of Variable” , therefor no need to write “&” before pointer variable .
• Pointer stores the address of another variable , it accesses variable directly.