Errors

main.c(12) : warning C4127: conditional expression is constant
main.c(13) : warning C4127: conditional expression is constant
main.c(20) : error C2143: syntax error : missing ';' before 'type'
main.c(21) : error C2143: syntax error : missing ';' before 'type'
main.c(22) : error C2275: 'FILE' : illegal use of this type as an expression
        C:\Program Files\Microsoft Visual Studio 10.0\VC\INCLUDE\stdio.h(66) : see declaration of 'FILE'
main.c(22) : error C2065: 'f' : undeclared identifier
main.c(23) : error C2143: syntax error : missing ';' before 'type'
main.c(25) : error C2065: 'file_pos' : undeclared identifier
main.c(26) : error C2065: 'f' : undeclared identifier
main.c(26) : warning C4047: '=' : 'int' differs in levels of indirection from 'FILE *'
main.c(28) : error C2065: 'f' : undeclared identifier
main.c(28) : error C2065: 'file_pos' : undeclared identifier
main.c(28) : warning C4047: '=' : 'int' differs in levels of indirection from 'FILE *'
main.c(30) : warning C4127: conditional expression is constant
main.c(31) : error C2065: 'line' : undeclared identifier
main.c(31) : warning C4047: 'function' : 'char *' differs in levels of indirection from 'int'
main.c(31) : warning C4024: 'fgets' : different types for formal and actual parameter 1
main.c(31) : error C2065: 'f' : undeclared identifier
main.c(31) : warning C4047: 'function' : 'FILE *' differs in levels of indirection from 'int'
main.c(31) : warning C4024: 'fgets' : different types for formal and actual parameter 3
main.c(32) : error C2065: 'line' : undeclared identifier
main.c(32) : warning C4047: 'function' : 'char *' differs in levels of indirection from 'int'
main.c(32) : warning C4024: 'execute' : different types for formal and actual parameter 1
main.c(32) : error C2065: 'ht' : undeclared identifier
main.c(32) : warning C4047: 'function' : 'Hashtable **' differs in levels of indirection from 'int *'
main.c(32) : warning C4024: 'execute' : different types for formal and actual parameter 2
main.c(34) : error C2065: 'f' : undeclared identifier
main.c(34) : warning C4047: 'function' : 'FILE *' differs in levels of indirection from 'int'
main.c(34) : warning C4024: 'fclose' : different types for formal and actual parameter 1
main.c(35) : error C2065: 'file_pos' : undeclared identifier
main.c(37) : error C2065: 'f' : undeclared identifier
main.c(37) : error C2065: 'file_pos' : undeclared identifier
main.c(37) : warning C4047: '=' : 'int' differs in levels of indirection from 'FILE *'
main.c(40) : error C2065: 'ht' : undeclared identifier
main.c(40) : warning C4047: 'function' : 'Hashtable **' differs in levels of indirection from 'int *'
main.c(40) : warning C4024: 'delete_hashtable' : different types for formal and actual parameter 1