Thread: problem with pointers

THis is a program that splits a given string when it finds the
delimiter.
i.e this/is/a/boy/ delimiter is "/"
this
is
a
boy
i dont know what is the error but is alocated in split() function
can you help me guys?

Code:

#include<stdio.h>
#include<string.h>

#define MAXSPLITS 80

char **split(char *delimiter, char *str, int *cntp);
char *mem_alloc(char *buffer);
char *bufferAlloc,*buffer;
char **bufferSplits,**bufferAlcSpl;

int main (void){
char *inptStr,*delStr,**strArray;
int  *countSplits=(int *)malloc(1 * sizeof(int));
 
//buffer for a given string
  bufferAlloc=(char *)malloc(81*sizeof(char));
//buffer for the array that stores the splits
  bufferAlcSpl=(char **)malloc(81*sizeof(char*));
  
  if(bufferAlloc==NULL || bufferAlcSpl==NULL){
    printf("MEMORY ALLOCATION ERROR");
    exit(1);
  }else{
    buffer=bufferAlloc;
    bufferSplits=bufferAlcSpl;
    }
    
 printf("\nEnter a string to split\n");
  gets(buffer);
  
  inptStr=mem_alloc(buffer);
  strcpy(inptStr,buffer);
    
  printf("\nEnter delimiter\n");
  gets(buffer);
  
  delStr=mem_alloc(buffer);
  strcpy(delStr,buffer);
    
  strArray=split(delStr,inptStr, countSplits);

return 0;
}


//dynamic memory allocation for the given strings
char *mem_alloc( char *buffer)
{
  
char *str;
	   
	str=(char *)malloc((strlen(buffer)+1)*sizeof(char)); 
	
	if (!str){
	      	  fprintf (stderr, "Allocation error\n"); 
		  exit (1);
	      	 }
		
 return(str);  
}
//this is the buggy function 
char **split(char *delimiter, char *str, int *cntp)
{
 int counter=strlen(delimiter);
 int i=0,j=0;
 char *findDel;
 char *strPtr=str;
 
 for(i=0;i<MAXSPLITS;i++){	 
 	 findDel=strstr(strPtr,delimiter);
  
  if(findDel){ 
     while(strPtr++<findDel)
     {     
	  bufferSplits[i][j] = *str++;
     j++;
     }
	bufferSplits[i][j]='\0';
  	str+=counter;
   strPtr+=counter;
  }
 
 }
 
 for(i=0;bufferSplits[i];i++)
 printf("\n%s\n",bufferSplits[i]);
}

Also don't cast the return of malloc. Had you not then you would have gotten an error message because you forgot stdlib.h