Question

How to clear input buffer in C

Answer 1

#include <stdio.h>

void clear(void) {
	int ch; 
    
	while((ch = getchar()) != '\n' && ch != EOF); 
}
 
int main()
{
    int a, b, c;
    
	scanf("%d %d %d", &a, &b, &c);
	
	printf("a = %d b = %d c = %d\n", a, b, c);
	
	clear(); // clear the buffer
	 
    return 0;
}
 
 
 
 
/*
run :
 
4 7 9
a = 4 b = 7 c = 9
 
*/
 

 

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Answer 2

#include <stdio.h>
  
int main()
{
    int a, b, c;
     
    scanf("%d %d %d", &a, &b, &c);
     
    printf("a = %d b = %d c = %d\n", a, b, c);
     
    fflush(stdin); // clear the buffer // not standard
      
    return 0;
}
  
  
  
  
/*
run :
  
345 647 z
a = 345 b = 647 c = 0
  
*/

 

 

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