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#include<string.h> #include<ctype.h> #include<stdio.h>
void keyword(char str[10])
{
if(strcmp("for",str)==0||strcmp("while",str)==0||strcmp("do",str)==0||strcmp("int",str)==0||str cmp("float",str)==0||strcmp("char",str)==0||strcmp("double",str)==0||strcmp("static",str)==0||strcmp("switch",str
)==0||strcmp("case",str)==0)
printf("\n%s is a keyword",str);

else

}
main()
{

printf("\n%s is an identifier",str);



FILE *f1,*f2,*f3; char c,str[10],st1[10];
int num[100],lineno=0,tokenvalue=0,i=0,j=0,k=0; printf("\nEnter the c program");/*gets(st1);*/ f1=fopen("input","w"); while((c=getchar())!=EOF)
putc(c,f1); fclose(f1); f1=fopen("input","r"); f2=fopen("identifier","w"); f3=fopen("specialchar","w"); while((c=getc(f1))!=EOF) {
if(isdigit(c))
{