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POArray of Structs strange output?
 

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  1. POArray of Structs strange output?
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    <p>Can anyone give me some indication as to why array of structs doesn't print out properly ?</p> <p>I think its something to do with the memory I have allocated to the struct I am unsure !!</p> <p>Using mac osx mountain lion xcode 4 gcc</p> <p>Thanks for any help completely stuck!! (Please have patience I am only a student !)</p> <pre><code>#include &lt;stdio.h&gt; #include &lt;limits.h&gt; #include &lt;ctype.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; #include &lt;unistd.h&gt; #include &lt;sys/types.h&gt; typedef struct{ char* one; char* two; } Node; Node *nodes; int count = 0; //----------------------------------------------------------------------- void add(char *one,char*two){ char x[40]; char y[40]; printf("reached..\n"); strcpy(x,one); strcpy(y,two); printf("--&gt; X: %s\n",x); printf("--&gt; Y: %s\n",y); Node newNode; newNode.one = x; newNode.two = y; nodes[count]= newNode; count++; } //----------------------------------------------------------------------- //----------------------------------------------------------------------- void print(){ int x; for (x = 0; x &lt; 10; x++) { printf("%d : (%s, %s) \n",x,nodes[x].one, nodes[x].two); } } //----------------------------------------------------------------------- //----------------------------------------------------------------------- void check(char **arg) { if(strcmp(*arg, "Add") == 0) { add(arg[1],arg[2]); }else if(strcmp(*arg,"print") == 0) { print(); }else{ printf("Error syntax Enter either: \n Add [item1][item2]\n OR \n print\n"); } } //----------------------------------------------------------------------- void readandParseInput(char *line,char **arg) { if (fgets (line, 512, stdin)!= NULL) { char * pch; pch = strtok (line," \n\t"); int count = 0; arg[0] = pch; while (pch != NULL) { count++; pch = strtok (NULL, " \n\t"); arg[count] =pch; } }else{ printf("\n"); exit(0); } } //----------------------------------------------------------------------- int main() { int size = 100; nodes = calloc(size, sizeof(Node)); int i; for(i = 0;i &lt;100; i++){ printf("%s , %s \n",nodes[i].one,nodes[i].two ); // nodes[i].one = "."; // nodes[i].two = "."; } char line[512]; /* the input line */ char *arg[50]; /* the command line argument */ while (1) { readandParseInput(line,arg); if(arg[0] != NULL){ check(arg); } } return(0); } </code></pre>
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    1. USKevin Paton
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    1. COwhat is your output? You can put breakpoints and use watch window to see what your variables are doing?
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