fork download

#include <pthread.h>
 
#include <stdio.h>
 
#include <stdlib.h>
 
#include <string.h>
 
#include <unistd.h>
 
#include <time.h>
 
 
 
#define MAX_SIZE 2000000
 
 
 
 
 
 
 
 
 
struct Data{
 
       char name[20];
 
       int value;
 
       };
 
 
 
Data *sort (Data *data , int numOfData)    ;           // insert sort using struct-datatype , ranked by the value)
 
 
 
 pthread_t tid1,tid2;
 
 pthread_mutex_t lock;
 
 
 
 int numOfData =0;
 
 FILE *rank;
 
 Data *data  = (Data*)malloc(sizeof(Data)*MAX_SIZE);                  // use struct datastructure ( char name[20] , int value)                        
 
 char nameData[20];       // two temp data for scanning from the file
 
 int valueData;  
 
 int count = 0;
 
 
 
 
 
void *rankP (void *param){                                         //   <------ pthread 
 
 
 
    while(!feof(rank)){ 
 
    pthread_mutex_lock(&lock);         
 
 
 
    if(fscanf(rank,"%s",nameData)== EOF)
 
    break;
 
    else      
 
    strcpy(data[numOfData].name,nameData);          
 
    fscanf(rank,"%d",&valueData);               // get  userID(%s) and userScore(%d)   
 
    data[numOfData].value = valueData;   
 
    numOfData++;            
 
    printf(" working ........  count = %d  \n",count++);
 
 
 
    pthread_mutex_unlock(&lock);
 
 
 
    }
 
 
 
}
 
 
 
 
 
int main (int argc , char* argv[]){
 
 
 
 
 
    rank = fopen(argv[1],"r");
 
    time_t t1,t2;
 
    t1 = time(NULL);
 
    if(pthread_mutex_init(&lock, NULL) != 0)
 
    {
 
        printf("\n mutex init failed\n");
 
        return 1;
 
    }
 
 
 
 
 
    pthread_attr_t attr1 , attr2;  
 
    pthread_attr_init(&attr1);
 
    pthread_attr_init(&attr2);
 
    pthread_create(&tid1,&attr1,rankP,NULL);
 
    pthread_create(&tid2,&attr2,rankP,NULL);
 
    pthread_join(tid1,NULL);
 
    pthread_join(tid2,NULL);
 
 
 
    t2 = time(NULL);
 
    printf(" sorted after %d seconds \n", t2-t1);
 
 
 
 
 
 
 
    //  <----------------   parent process
 
    printf("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");
 
 
 
     char ch[5];
 
     Data *t = sort(data,numOfData);   
 
 
 
    FILE *result = fopen(argv[2],"w");        // write in the data to file
 
    for(int i=0 ; i<=numOfData-1 ; i++){
 
            sprintf(ch,"%d",t[i].value);
 
            fprintf(result,t[i].name);
 
            fprintf(result,"\t");
 
            fprintf(result,ch);
 
            fprintf(result,"\n");
 
 
 
 
 
 

prog.c:35: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
prog.c:49: error: expected ‘=’, ‘,’, ‘;’, ‘asm’ or ‘__attribute__’ before ‘*’ token
prog.c: In function ‘rankP’:
prog.c:77: error: ‘data’ undeclared (first use in this function)
prog.c:77: error: (Each undeclared identifier is reported only once
prog.c:77: error: for each function it appears in.)
prog.c:79: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result
prog.c: In function ‘main’:
prog.c:147: warning: format ‘%d’ expects type ‘int’, but argument 2 has type ‘time_t’
prog.c:163: error: ‘Data’ undeclared (first use in this function)
prog.c:163: error: ‘t’ undeclared (first use in this function)
prog.c:163: warning: implicit declaration of function ‘sort’
prog.c:163: error: ‘data’ undeclared (first use in this function)
prog.c:169: error: ‘for’ loop initial declaration used outside C99 mode
prog.c:173: warning: format not a string literal and no format arguments
prog.c:177: warning: format not a string literal and no format arguments
prog.c:179: error: expected declaration or statement at end of input
prog.c:179: error: expected declaration or statement at end of input

Standard output is empty