foo.c:1:1: warning: data definition has no type or storage class
 n=int(input('number of tests:'))
 ^
foo.c:1:1: warning: type defaults to 'int' in declaration of 'n' [-Wimplicit-int]
foo.c:1:3: error: expected expression before 'int'
 n=int(input('number of tests:'))
   ^~~
foo.c:1:13: warning: character constant too long for its type
 n=int(input('number of tests:'))
             ^~~~~~~~~~~~~~~~~~
foo.c:4:19: warning: character constant too long for its type
     s=s+int(input('score:'))
                   ^~~~~~~~

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