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This is the Lex Program to identify tokens in a program using regular expressions [cc lang=”c”] %{ #include %} %% bool|int|float printf(“Keyword”); [-,+]?[0-9]+ printf(“Constants”); [,.’”]+ printf(“Punctuation Chars”); [!@#$%^&*()]+ printf(“Special Chars”); [a-zA-Z]+ printf(“Identifiers”); %% main(){yylex();}...
This is the symbol table implementation in yacc using regular expressions,it checks for redeclaration of variables and multiple declarations of variables Lex Program: [cc lang=”c”] %{ #include “y.tab.h” extern char * yylval; int x=0;...
This is the lex program to check parenthesis matching,it checks whether left parenthesis or right parenthesis is missing [cc lang=”c”] %{ #include int l=0,r=0,cbl=0,cbr=0; %} %% [(] l++; [)] r++; [{] cbl++; [}] cbr++;...
This is the lex program to check whether the given string is palindrome or not. [cc lang=”c”] %{ #include char num,temp[100]; int rev=0; char arr[100]; %} %% . scanf(“%s”,arr); temp=arr; while(temp!=0){rev=rev*10+(temp%10); temp/=10;} if(rev==num) printf(“PALI”);...
This is the lex program to identify the type of number using regular expressions [cc lang=”c”] %{ #include int a=0,b=0,c=0,d=0; %} %% [+]?[0-9]+ {printf(“Postive Integer %d”,a);a++;} [-]{1}[0-9]+ {printf(“Negative Integer %d”,b);b++;} [+]?[0-9]+[.]{1}[0-9]+ {printf(“Postive Fraction %d”,c);c++;}...
Yacc program to identify function declaration syntax and semantics using regular expressions Lex Program: [cc lang=”c”] %{ #include #include “y.tab.h” %} %% void|int|float|char return BUILTIN; , return COMMA; ; return SC; n return NL;...
Lex Program to Identify both single line and multi line comments using regular expressions in lex [cc lang=”c”] %{ #include %} %% [/]{1}[/]{1}[a-zA-Z0-9]* printf(“Single Line Comment”); [/]{1}[*]{1}[a-zA-Z0-9]*[*]{1}[/]{1} printf(“MultiLine Comment”); %% main(){yylex();} [/cc]
This is the YACC Program to Implement a program that accepts string of form a^nb where n>=1 ie..aaab or aaaaab or ab.it cannot have two or more than one b’s at the end Lex:...
This is the C program to find the transpose of a matrix. A matrix which is formed by turning all the rows of a given matrix into columns and vice-versa. [cc lang=”c”] #include void...
This is the C Program to find the diagonal sum of a matrix [cc lang=”c”] #include void main() { int a[10][10],i,j,fwsum=0,rwsum=0,n; printf(“Enter the no. of rows and columns for Matrix :”); scanf(“%d”,&n); printf(“nnNow enter...
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