CODEWITHSUNDEEP
cpalindrome
Boolean
Boolean

Reputation: 17

linux palindrom string arguments

I have to write a program which receives words as arguments.For every argument I have to create a thread that verify if the word is palindrom and in that case it will increment a global variable sum. This is what I did

#include <stdio.h>
#include <string.h>
#include <pthread.h>
#define MAX 15

pthread_mutex_t mtx;
int sum=0;
void *Pal(void *arg) {
 char *p=char arg;
// char p=*(int*)arg;
int len,j;
int flag=0;
printf("%s received. ", p);
len= strlen(p);
for (j=0; j<len; j++) {
  pthread_mutex_lock(&mtx);
  if(p[j] ==p[len-j-1])
  flag +=1;
  pthread_mutex_unlock(&mtx); 
}
if (flag==len) {
 printf("%s is palindrome.good job \n", p);
 sum +=1; 
}
 else {
 printf("%s is not palindrome.Fail \n", p);
 }
 }  

int main( int argc, char* argv[]) {
int i;
pthread_mutex_init(&mtx, NULL);
pthread_t t[MAX]; 
for(i=1 ; i<argc; i++) 
  pthread_create(&t[i], NULL, Pal, argv[i]);
for(i=1 ; i<argc; i++)
  pthread_join(t[i], NULL);
printf("The global sum is:%d \n", sum);
return 0;
}

The problem is there: char p=char arg.I don't know how to make the relation between the strings and the arguments. If someone can help me I would be apreciated.

Upvotes: 1

Views: 143

Answers (1)

Iharob Al Asimi
Iharob Al Asimi

Reputation: 53016

You don't need the cast because void * is converted to any poitner type without a cast in c, so

char *p = arg;

would work.

I didn't check the rest of the program, so I can't say if the program will work as you expect, but at least this fixes one problem.

Upvotes: 2

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