Code:
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
typedef struct vote {
char name [30];
int id,type,candidate;
} vote;
void report(FILE* college[3], FILE* arr[10], char* canceled);
// Fuction returns the minimal id
int getMin(int eof[],vote [],int *);
// Function checks a vote record correct
int votecheck(vote ,vote [],int i);
// Function reads the next record from "college" file
int readFrom(FILE *,vote [],int);
int main ()
{
FILE* f[10];
FILE* c[3];
char name[3]="canceled";
c[0]=fopen("c:\\file1","r");//vote files ,each file represents the votes from a college
c[1]=fopen("c:\\file2","r");
c[3]=fopen("c:\\file3","r");
f[0]=fopen("c:\\cfile1","w");//condidate files
f[1]=fopen("c:\\cfile2","w");
f[2]=fopen("c:\\cfile3","w");
f[3]=fopen("c:\\cfile4","w");
f[4]=fopen("c:\\cfile5","w");
f[5]=fopen("c:\\cfile6","w");
f[6]=fopen("c:\\cfile7","w");
f[7]=fopen("c:\\cfile8","w");
f[8]=fopen("c:\\cfile9","w");
f[9]=fopen("c:\\cfile10","w");
fclose(c[0]);
fclose(c[1]);
fclose(c[2]);
fclose(f[0]);
fclose(f[1]);
fclose(f[2]);
fclose(f[3]);
fclose(f[4]);
fclose(f[5]);
fclose(f[6]);
fclose(f[7]);
fclose(f[8]);
fclose(f[9]);
report(c, f, name);
return 0;
}
void report(FILE *college[3], FILE *arr[10], char* canceled){
FILE *cancel;
vote currtable[3], // array for three current "college" records
votable[3], // array for checking the records with the same "id"
current; // struct for the current "college" record
int i,j,idmin,index,flag,eof[3];
if(!(cancel=fopen("c:\\canceled","w"))) exit(1);
for(i=0;i<3;i++)
eof[i]= readFrom(college[i],currtable,i);
// main loop
while(eof[0]!=EOF||eof[1]!=EOF||eof[2]!=EOF){
idmin=getMin(eof,currtable,&index);
for(i=flag=0;i<3;i++)
if(i!=index && eof[i]!=EOF && currtable[i].id==idmin)
flag=3;
if(flag){
fprintf(cancel,"%s%d%d\n",currtable[index].name,idmin,flag);
for(i=0;i<3;i++)
while(eof[i]!=EOF && currtable[i].id==idmin)
eof[i]=readFrom(college[i],currtable,i);
continue;
}
//Filling struct table for the minimal id
votable[0]=currtable[index];
i=1;
while(eof[index]!=EOF && i<3){
eof[index]=fscanf(college[index],"%30s%9d%1d%1d%*c",
current.name,¤t.id,¤t.type,¤t.candidate);
if(current.id!=idmin){
for(j=0;j<i;j++)
fprintf(arr[votable[j].candidate],"%9d%d%d\n",
idmin,index,votable[j].type);
currtable[index]=current;
break;
}
else{
flag=votecheck(current,votable,i);
if(flag){ fprintf(cancel,"%s%d%d\n",currtable[index].name,idmin,flag);
while(eof[index]!=EOF && currtable[index].id==idmin)
eof[index]=readFrom(college[index],currtable,index);
break;
}
else
votable[i++]=current;
}//else
}//while
if(i<3) continue;
if(eof[index]!=EOF)
eof[index]=fscanf(college[index],"%30[^\n]%9d%1d%1d%*c",
current.name,¤t.id,¤t.type,¤t.candidate);
if(eof[index]==EOF ||current.id!=idmin ){
for(j=0;j<i;j++)
fprintf(arr[votable[j].candidate],"%9d%d%d\n",
idmin,index,votable[j].type);
currtable[index]=current;
}
else{ fprintf(cancel,"%s%d%d\n",votable[0].name,idmin,2);
while(eof[index]!=EOF && currtable[index].id==idmin)
eof[index]=readFrom(college[index],currtable,index);
}
}// main loop - while
fclose(cancel);
}// report
int votecheck(vote curr,vote arr[],int i){
int j,count;
for(j=count=0;j<i;j++){
if(curr.candidate==arr[j].candidate)
return 1;
if(curr.type==1 && arr[j].type==1)
return 2;
if(curr.type==2 && arr[j].type==2)
count++;
if(count>1) return 2;
}
return 0;
}
int readFrom(FILE *coll,vote table[],int i){
return fscanf(coll,"%30[^\n]%9d%1d%1d%*c",table[i].name,
&table[i].id,&table[i].type,&table[i].candidate);
}
int getMin(int eof[],vote table[],int *index){
int i,idmin;
for(i=0,idmin=999999999;i<3;i++)
if(eof[i]!=EOF && table[i].id<idmin){
idmin=table[i].id;
*index=i;
}
return idmin;
}
