/in/foo.c: In function 'main':
/in/foo.c:6:17: warning: format '%f' expects argument of type 'float *', but argument 2 has type 'double *' [-Wformat=]
    6 |         scanf("%f,%f,%f",&a,&b,&c);
      |                ~^        ~~
      |                 |        |
      |                 float *  double *
      |                %lf
/in/foo.c:6:20: warning: format '%f' expects argument of type 'float *', but argument 3 has type 'double *' [-Wformat=]
    6 |         scanf("%f,%f,%f",&a,&b,&c);
      |                   ~^        ~~
      |                    |        |
      |                    float *  double *
      |                   %lf
/in/foo.c:6:23: warning: format '%f' expects argument of type 'float *', but argument 4 has type 'double *' [-Wformat=]
    6 |         scanf("%f,%f,%f",&a,&b,&c);
      |                      ~^        ~~
      |                       |        |
      |                       float *  double *
      |                      %lf
/in/foo.c:7:12: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    7 |         if(a=0){
      |            ^
/in/foo.c:8:20: warning: suggest parentheses around assignment used as truth value [-Wparentheses]
    8 |                 if(b=0){
      |                    ^
/in/foo.c:13:9: error: expected '}' before 'else'
   13 |         else{
      |         ^~~~
/in/foo.c:14:9: error: 'delta' undeclared (first use in this function)
   14 |         delta=(b*b-4*a*c);
      |         ^~~~~
/in/foo.c:14:9: note: each undeclared identifier is reported only once for each function it appears in
/in/foo.c:16:9: error: 'x1' undeclared (first use in this function); did you mean 'x'?
   16 |         x1=-b+sqrt(delta)/2a;
      |         ^~
      |         x
/in/foo.c:16:15: warning: implicit declaration of function 'sqrt' [-Wimplicit-function-declaration]
   16 |         x1=-b+sqrt(delta)/2a;
      |               ^~~~
/in/foo.c:2:1: note: include '<math.h>' or provide a declaration of 'sqrt'
    1 | #include <stdio.h>
  +++ |+#include <math.h>
    2 | 
/in/foo.c:16:15: warning: incompatible implicit declaration of built-in function 'sqrt' [-Wbuiltin-declaration-mismatch]
   16 |         x1=-b+sqrt(delta)/2a;
      |               ^~~~
/in/foo.c:16:15: note: include '<math.h>' or provide a declaration of 'sqrt'
/in/foo.c:16:27: error: invalid suffix "a" on integer constant
   16 |         x1=-b+sqrt(delta)/2a;
      |                           ^~
/in/foo.c:17:9: error: 'x2' undeclared (first use in this function); did you mean 'x'?
   17 |         x2=-b+sqrt(delta)/2a;
      |         ^~
      |         x
/in/foo.c:17:27: error: invalid suffix "a" on integer constant
   17 |         x2=-b+sqrt(delta)/2a;
      |                           ^~
/in/foo.c:19:9: error: expected '}' before 'else'
   19 |         else{
      |         ^~~~
/in/foo.c:20:17: error: 'real' undeclared (first use in this function)
   20 |                 real=-b/2a,imagin=i*sqrt(-delta)/2a;
      |                 ^~~~
/in/foo.c:20:25: error: invalid suffix "a" on integer constant
   20 |                 real=-b/2a,imagin=i*sqrt(-delta)/2a;
      |                         ^~
/in/foo.c:20:28: error: 'imagin' undeclared (first use in this function); did you mean 'main'?
   20 |                 real=-b/2a,imagin=i*sqrt(-delta)/2a;
      |                            ^~~~~~
      |                            main
/in/foo.c:20:35: error: 'i' undeclared (first use in this function)
   20 |                 real=-b/2a,imagin=i*sqrt(-delta)/2a;
      |                                   ^
/in/foo.c:20:37: warning: incompatible implicit declaration of built-in function 'sqrt' [-Wbuiltin-declaration-mismatch]
   20 |                 real=-b/2a,imagin=i*sqrt(-delta)/2a;
      |                                     ^~~~
/in/foo.c:20:37: note: include '<math.h>' or provide a declaration of 'sqrt'
/in/foo.c:20:50: error: invalid suffix "a" on integer constant
   20 |                 real=-b/2a,imagin=i*sqrt(-delta)/2a;
      |                                                  ^~
/in/foo.c:20:27: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   20 |                 real=-b/2a,imagin=i*sqrt(-delta)/2a;
      |                           ^
/in/foo.c:21:25: error: 'image' undeclared (first use in this function)
   21 |                 x1=real+image,x2=real-image;
      |                         ^~~~~
/in/foo.c:21:30: warning: left-hand operand of comma expression has no effect [-Wunused-value]
   21 |                 x1=real+image,x2=real-image;
      |                              ^
/in/foo.c:24:1: error: expected declaration or statement at end of input
   24 | }
      | ^
/in/foo.c:5:16: warning: variable 'x' set but not used [-Wunused-but-set-variable]
    5 |         double x,a,b,c;
      |                ^