#include <strings.h>
#define MAXSYMBOLS 100
typedef struct {
    char name[21];
    double val;
} SymbolTableEntry;

SymbolTableEntry SymbolTable[100];

static int maxsymtab = 0;

/* addsymtab - Adds an identifier to the Symbol Table             */
/*             If identifier is in Symbol Table, then no add done */
void addsymtab(char *name) {
     int ix, found;
     found = -1;
     for (ix=0; ix<maxsymtab; ix++) {
          if (!strcmp(SymbolTable[ix].name, name)){ 
               found = ix;
          }
     }

     if (found == -1) {
          strcpy(SymbolTable[maxsymtab].name, name);
          SymbolTable[maxsymtab].val = 0;
          maxsymtab++;
     }
          
}


/* getsymtab - Gets value from SymbolTable for indicated identifier */
double getsymtab(char *name) {
     int ix;
     for (ix=0; ix<maxsymtab; ix++) {
          if (!strcmp(SymbolTable[ix].name, name)){ 
               return(SymbolTable[ix].val);
          }
     }
     addsymtab(name);
     return(0);
}


/* setsymtab - Sets value for indicated identifier in SymbolTable */
void setsymtab(char *name, double value) {
     int ix;
     addsymtab(name);
     for (ix=0; ix<maxsymtab; ix++) {
          if (!strcmp(SymbolTable[ix].name, name)){ 
               SymbolTable[ix].val = value;
               return;
          }
     }
}


/* printsymtab - Prints all values in the SymbolTable */
void printsymtab(void) {
     int ix;
     printf("Identifier             Value\n");
     for (ix=0; ix<maxsymtab; ix++) {
          printf("%-20s   %10.4f\n", SymbolTable[ix].name, 
SymbolTable[ix].val);
     }
}