c++ - scanf causes loop to terminate early -

c='q'; while(c=='q')  {    printf("hello");    scanf("%c",&c);  } 

why loop exit without reason on taking input?

i'm going assume want user input of 'q' mean quit, , want loop exit when c == 'q'.

try:

c='\0'; while(c !='q')  {    printf("hello");    scanf("%c",&c);  }