foo.c: In function 'main':
foo.c:6:15: warning: passing argument 1 of 'scanf' makes pointer from integer without a cast [-Wint-conversion]
    6 |         scanf(a,b);
      |               ^
      |               |
      |               int
In file included from foo.c:1:
/nix/store/3w4yrspgcx1z9wi18rv0hbap4jjlhx4c-glibc-2.37-8-dev/include/stdio.h:421:42: note: expected 'const char * restrict' but argument is of type 'int'
  421 | extern int scanf (const char *__restrict __format, ...) __wur;
      |                   ~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~
foo.c:7:12: error: expected '(' before 'a'
    7 |         if a%4==0,b==2;
      |            ^
      |            (
foo.c:7:12: warning: statement with no effect [-Wunused-value]
foo.c:8:24: error: expected ';' before 'if'
    8 |          printf("29/n")
      |                        ^
      |                        ;
    9 |           if b==1||b==3||b==5||b=7||b==8||b==10||b==12;
      |           ~~            
foo.c:10:26: error: expected ';' before 'if'
   10 |            printf("31/n")
      |                          ^
      |                          ;
   11 |                  if b==4||b==6||b==9||b==11;
      |                  ~~       
foo.c:12:30: error: expected ';' at end of input
   12 |                printf("30/n")
      |                              ^
      |                              ;
   13 | 
foo.c:12:16: error: expected declaration or statement at end of input
   12 |                printf("30/n")
      |                ^~~~~~

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