/in/foo.c: In function 'main':
/in/foo.c:11:4: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    if(c=b)
    ^~
/in/foo.c:17:6: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
      if(c=a)
      ^~
/in/foo.c:22:3: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
   if(b=a)
   ^~
/in/foo.c:26:5: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     if(c=a)
     ^~
/in/foo.c:34:5: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
     if(c=a)
     ^~
/in/foo.c:40:7: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
       if(c=b)
       ^~