c - strtok overwrites my variables -

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i'm trying use strtok () store info struct. code looks this

char *temptype = null, name[100], filestring[100]; int *tempitems = null, *tempcost = null; file *infile = null; itemtype myvector;  infile = fopen ("grocery_list.txt", "r");  while (!feof (infile)) {     fscanf (infile, "%s", &filestring);     temptype = strtok (filestring, ":");     tempcost = (int *) strtok (null, ":");     tempitems = (int *) strtok (null,":");     myvector.type[num_items] = temptype;     myvector.cost[num_items] = tempcost;     myvector.items[num_items] = tempitems;     num_items++; }

everytime run it, values in myvector.type becomes "cherries" , i'm not sure why. infile: apples:5:1 milk:3:2 bread:3:1 candy:10:1 cheese:5:6 oranges:4:2 cherries:3:2

the function strtok returns pointer , pointer gets overwritten each execution of while loop. in end array entries point same memory address. need copy string strtok returns.


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