This is ShiftParser

scratch_1.cpp

#include<string.h>

char a[10];
int top=-1,i;
void error(){
    printf("Syntax Error");
}
void push(char k[]) //Pushes The Set Of Characters on to the Stack
{
    for(i=0;k[i]!='\0';i++)
    {
        if(top<9)
            a[++top]=k[i];
    }
}
char TOS()        //Returns TOP of the Stack
{
    return a[top];
}
void pop()       //Pops 1 element from the Stack
{
    if(top>=0)
        a[top--]='\0';
}
void display()  //Displays Elements Of Stack
{
    for(i=0;i<=top;i++)
        printf("%c",a[i]);
}
void display1(char p[],int m) //Displays The Present Input String
{
    int l;
    printf("\t");
    for(l=m;p[l]!='\0';l++)
        printf("%c",p[l]);
}
char* stack(){
    return a;
}
int main()
{
    char ip[20],r[20],st,an;
    int ir,ic,j=0,k;
    char t[5][6][10]={"$","$","TH","$","TH","$",
                      "+TH","$","e","e","$","e",
                      "$","$","FU","$","FU","$",
                      "e","*FU","e","e","$","e",
                      "$","$","(E)","$","i","$"};

    printf("\nEnter any String(Append with $)");
    gets(ip);
    printf("Stack\tInput\tOutput\n\n");
    push("$E");
    display();
    printf("\t%s\n",ip);
    for(j=0;ip[j]!='\0';)
    {
        if(TOS()==an)
        {
            pop();
            display();
            display1(ip,j+1);
            printf("\tPOP\n");
            j++;
        }
        an=ip[j];
        st=TOS();
        if(st=='E')ir=0;
        else if(st=='H')ir=1;
        else if(st=='T')ir=2;
        else if(st=='U')ir=3;
        else if(st=='F')ir=4;
        else {
            error();
            break;
        }
        if(an=='+')ic=0;
        else if(an=='*')ic=1;
        else if(an=='(')ic=2;
        else if(an==')')ic=3;
        else if((an>='a'&&an<='z')||(an>='A'&&an<='Z')){ic=4;an='i';}
        else if(an=='$')ic=5;
        strcpy(r,strrev(t[ir][ic]));
        strrev(t[ir][ic]);
        pop();
        push(r);
        if(TOS()=='e')
        {
            pop();
            display();
            display1(ip,j);
            printf("\t%c->%c\n",st,238);
        }
        else{
            display();
            display1(ip,j);
            printf("\t%c->%s\n",st,t[ir][ic]);
        }
        if(TOS()=='$'&&an=='$')
            break;
        if(TOS()=='$'){
            error();
            break;
        }
    }
    k=strcmp(stack(),"$");
    if(k==0 && i==strlen(ip))
        printf("\n Given String is accepted");
    else
        printf("\n Given String is accepted");
    return 0;
}