foo.c: In function 'main':
foo.c:8:32: warning: implicit declaration of function 'abs' [-Wimplicit-function-declaration]
    8 |  if(a>=b+c||b>=a+c||c>=a+b||a<=abs(b-c)||b<=abs(a-c)||c<=abs(a-b))
      |                                ^~~
foo.c:8:37: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
    8 |  if(a>=b+c||b>=a+c||c>=a+b||a<=abs(b-c)||b<=abs(a-c)||c<=abs(a-b))
      |                                    ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:8:50: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
    8 |  if(a>=b+c||b>=a+c||c>=a+b||a<=abs(b-c)||b<=abs(a-c)||c<=abs(a-b))
      |                                                 ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:8:63: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
    8 |  if(a>=b+c||b>=a+c||c>=a+b||a<=abs(b-c)||b<=abs(a-c)||c<=abs(a-b))
      |                                                              ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:15:33: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
   15 |  if(a<b+c&&b<a+c&&c<a+b&&a>abs(b-c)&&b>abs(a-c)&&c>abs(a-b))
      |                                ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:15:45: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
   15 |  if(a<b+c&&b<a+c&&c<a+b&&a>abs(b-c)&&b>abs(a-c)&&c>abs(a-b))
      |                                            ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:15:57: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
   15 |  if(a<b+c&&b<a+c&&c<a+b&&a>abs(b-c)&&b>abs(a-c)&&c>abs(a-b))
      |                                                        ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:17:9: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   17 |  if(a==b&&a!=c||a==c&&a!=b||b==c&&b!=a)
      |     ~~~~^~~~~~
foo.c:17:33: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
   17 |  if(a==b&&a!=c||a==c&&a!=b||b==c&&b!=a)
      |                             ~~~~^~~~~~
foo.c:36:33: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
   36 |  if(a<b+c&&b<a+c&&c<a+b&&a>abs(b-c)&&b>abs(a-c)&&c>abs(a-b))
      |                                ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:36:45: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
   36 |  if(a<b+c&&b<a+c&&c<a+b&&a>abs(b-c)&&b>abs(a-c)&&c>abs(a-b))
      |                                            ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:36:57: warning: 'abs' argument 1 promotes to 'double' where 'int' is expected in a call to built-in function declared without prototype [-Wbuiltin-declaration-mismatch]
   36 |  if(a<b+c&&b<a+c&&c<a+b&&a>abs(b-c)&&b>abs(a-c)&&c>abs(a-b))
      |                                                        ~^~
<built-in>: note: built-in 'abs' declared here
foo.c:6:2: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result]
    6 |  scanf("%f%f%f",&a,&b,&c);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~

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