every time ,why have I encountered with segmentation fault ? still,I have not found my fault sometimes, gcc emits segmentation fault ,sometimes, memory satck limit is exceeded I think you will understand (easily) what is for that code

void my_main()
    {             char *tutar[50],tempc;
       int i=0,temp,g=0,a=0,j=0,d=1,current=0,command=0,command2=0;

do{
  tutar[i]=malloc(sizeof(int));
  scanf("%s",tutar[i]);
  temp=*tutar[i];
   }
     while(temp=='x'); 

                  i=0;
            num_arrays=atoi(tutar[i]);
                   i=1;
            tempc=*tutar[i];

  if(tempc!='x' && tempc!='d' && tempc!='a' && tempc!='j')
   {
       current=1; 

       arrays[current]=malloc(sizeof(int));
       l_arrays[current]=calloc(1,sizeof(int));
       c_arrays[current]=calloc(1,sizeof(int));}

              i=1; current=1;
    while(1)
       {  tempc=*tutar[i];

        if(tempc=='x')
            break;

       if(tempc=='n')
        {
            ++current;

        arrays[current]=malloc(sizeof(int));
        l_arrays[current]=calloc(1,sizeof(int));
        c_arrays[current]=calloc(1,sizeof(int));

              ++i;
       continue;
        }

       if(tempc=='d')
         {
              ++i;
          command=atoi(tutar[i])-1;
          free(arrays[command]);

         free(l_arrays[command]);  free(c_arrays[command]);
           ++i;
          continue;
         }


     if(tempc=='j')
       { 
                  ++i;
        current=atoi(tutar[i])-1;

        if(arrays[current]==NULL)
       {
        arrays[current]=malloc(sizeof(int));
        l_arrays[current]=calloc(1,sizeof(int));
        c_arrays[current]=calloc(1,sizeof(int));

              ++i;
        }

    else
       {
         a=l_arrays[current];  j=l_arrays[current];
            ++i;}
           continue;
       }

 }

}