Calling scanf() after another string input function creates phantom input

Question

Here\'s a small program:

#include 

int main() {
  char str[21], choice[21]; int size;
  while(1){
    printf(\"$ \");
    fgets(str, 20, stdin);
         


        

Answer 1

As described in other answer scanf call leaves the newline in the input buffer you can also use getchar() after scanf like this :

scanf("%20s", choice);// always remember( & good) to include field width 
                      // in scanf while reading

Strings otherwise it will overwrite buffer in case of large strings `

getchar();  //this will eat up the newline 

Besides , you should also use fgets like this :

fgets(str,sizeof str, stdin); //Its better