NetNews Offline 2/NetNews Offline Volume 2.iso/news/comp/lang/c-part2/10288

Text File | 1996-08-05 | 4.7 KB | 187 lines

Path: lantana.singnet.com.sg!usenet
From: [e-mail] (XY Xie)
Newsgroups: comp.lang.c
Subject: Novice programmer needs help!
Date: Sat, 16 Mar 1996 17:10:53 GMT
Organization: Singapore Telecom Internet Service
Message-ID: <4ieov7$[e-mail]>
NNTP-Posting-Host: ts900-2822.singnet.com.sg
X-Newsreader: Forte Free Agent 1.0.82

    I'm learning C programming myself from a book and I recently wrote
this programme and I could not figure out why the errors occured.
Could some kind soul out there check the code for me? I used upper
case for all the error messages and I included them on a new line
following  the supposedly erroneous code (just to separate them from
the usual programming comments).

#include <stdio.h>
#include <conio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#define totnum 20       //total no. of entries in list=20

struct list{
 char name[15];         //alloc 15 chars for name
 char sex;
 int age;
};

void displaymenu(void);           //display menu for choice
char getchoice(void);                        //get a choice from  user
void addlist(struct list *friend[totnum]);         //add items to list
void allocatemem(struct list *friend[totnum]);     //allocate memory
void displist(struct list *friend[totnum]);        //display list
void search(struct list *friend[totnum]);          //search a name
 void dealloc(struct list *friend[totnum]);         //deallocate mem
// THE ABOVE 5 LINES GOT "ERROR: ) EXPECTED"

int num=0;              //current no. of entries

main()
{
 char choice;
 struct list *friend[numtot];
 //"ERROR:DECLARATION TERMINATED INCORRECTLY IN FUNCTION MAIN()"

  do
 {displaymenu();
  choice=getchoice();

  switch(choice)
  {case('a'):{addlist(friend);
                  break;}
    case('b'):{displist(friend);
                  break;}
    case('c'):{search(friend);
                  break;}
    case('d'):{dealloc(friend);
                  exit(1);
                  break;}
    //ALL THE 4 FUNCTIONS I CALLED ABOVE HAVE THESE:
    //"ERROR : CALL TO UNDEFINED FUNCTION IN FUNCTION MAIN()" and
    //"ERROR : EXPRESSION SYNTAX IN FUNCTION MAIN()"

    default:{puts("Wrong entry. Try again");
                break;}
  }
 } while(choice!='d');
 return 0;
}
//*****************************************************
void displaymenu(void)             //display menu
{
 puts("\n\t\tFRIENDS' PARTICULARS LIST");
 puts("\t\t-------------------------\n");
 puts("a. Add to list.");
 puts("b. Display list.");
 puts("c. Get person.");
 puts("d. Exit program.");
 printf("Enter your choice.(a,b,c or d):");
 return;
}
//*****************************************************
char getchoice(void)               //input choice
{
 char ans;
 fflush(stdin);
 ans=getche();
 ans=tolower(ans);     //convert all input to lower case
 printf("\n");
 return ans;
}
//*****************************************************
void addlist(struct list *friend[])        //add to list
//  "ERROR: ) EXPECTED"

{
 if(num==totnum)
 {puts("List is full");
  return;}
 allocatemem(friend);           //alloc mem for 1 structure variable
 printf("\nEnter name. ");
 fflush(stdin);
 fgets(friend[num]->name[],15,stdin);
 printf("Enter sex. ");
 fflush(stdin);
 friend[num]->sex=getchar();
 printf("Enter age. ");
 scanf(" %d", &friend[num]->age);
 num++;
 return;
}
//***************************************************
void allocatemem(struct list *friend[])         //alloc heap mem
{
 friend[num]=(struct list*)malloc(sizeof(struct list));
 if(!friend[num])
 {puts("Memory error,");
  exit(1);}
 return;
}
//*****************************************************
void displist(struct list *friend[])        //display entries and
{                                           //calc average age
 int c;
 float avg=friend[0]->age;
 if(num==0)
 {puts("\n\nThere is no name on the list");
  return;}
 for(c=0;c<num;c++)
 {
  printf("\n #%d\n",c+1);
  printf(" name:%ssex:%c\nage:%d\n",friend[c]->name[],
            friend[c]->sex,friend[c]->age);
  if(c!=0)
  {avg+=friend[c]->age;}
 }
    avg/=(float)c;
    printf("\n Average age is %.1f.\n",avg);
    return;
}
//******************************************************************
void search(struct list *friend[])
{
 int c,match=0;
 char ss[15];
 printf("\nEnter name to search. ");
 fflush(stdin);
 fgets(ss,15,stdin);
 for(c=0;c<num;c++)
 {ss[c]=tolower(ss[c]);}         //convert the user's input to lower
case
 for(c=0;c<num;c++)
 {if(!strcmp(ss,friend[c]->name[]));
  {printf("\n #%d\n",c+1);
    printf(" name:%s sex:%c\n age:%d\n",friend[c]->name[],friend[c]->sex,
             friend[c]->age);
    match=1;}
  }
  if(match==0)
  puts(" No match found.");

 return;
}
//********************************************************************
void dealloc(struct list *friend[])
{
 int c;
 for(c=0;c<num;c++)
 {
  free(friend[c]);
 }
 return;
}


    That's all . THANX!