taking input using scanf

Asked Apr 03 '20 at 04:52

Active Apr 03 '20 at 05:02

Viewed 25 times

when i run this program this takes input for a two times even if scanf is used only once,WHY?????

  #include<stdio.h>
  #include<conio.h>
int main(){
   int a,b,i=1,product;
   printf("Enter the value of a\n");
   scanf("%d\n",&a);
   printf("Enter the value of b\n");
   scanf("%d\n",&b);
   while(i<b){
      product = i*3;
      if(product > a){
         printf("%d*3 = %d\n",i,product);
         }
         i = i + 1;
      }
  }

edited Apr 03 '20 at 05:02

asked Apr 03 '20 at 04:52

s_ssuyash

1

You have used `scanf()` twice, line no.6 and line no.8 – Arpit Maiya Apr 03 '20 at 04:54
1

"takes input for a two times even if scanf is used only once" --> Remove `'\n'` from `scanf("%d\n",...);` Who or what text suggested doing that? – chux - Reinstate Monica Apr 03 '20 at 04:55
@chux-ReinstateMonica that was a typo – s_ssuyash Apr 03 '20 at 05:02
@chux-ReinstateMonica i have use \n for printing next printf in new line can u explain what problem is it causing – s_ssuyash Apr 03 '20 at 05:03
@chux-ReinstateMonica it worked fine after removing \n from scanf – s_ssuyash Apr 03 '20 at 05:05
s_ssuyash, "i have use \n for printing next printf" is about `'\n'` in `printf()`. My unanswered [question](https://stackoverflow.com/questions/61005300/taking-input-using-scanf#comment107928322_61005300), before we get into your later "what problem is it causing" , was about code's use of `'\n'` in `scanf()`. – chux - Reinstate Monica Apr 03 '20 at 13:03

taking input using scanf

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