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POPut array items in a list and print out the list items in C
 

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  1. POPut array items in a list and print out the list items in C
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    <p>In this program, I want to put the element in the list rather than an array. And lastly print out the list. </p> <p>eg. simon 22 suzie 24<br> ...</p> <p>However, I dont really understand how to manipulate the list, and how I can build the heap and retrieve it. I did some research about how to do it. And this is what I come up. And some of the error comes out and I have no idea how to fix. </p> <pre><code>error: 'ptr' undeclared (first use in this function) arrays.c:37:5: note: each undeclared identifier is reported only once for each function it appears in arrays.c: In function 'main': arrays.c:62:9: error: expected identifier or '(' before '=' token arrays.c:69:5: warning: passing argument 1 of 'insert' from incompatible pointer type arrays.c:28:13: note: expected 'struct Record *' but argument is of type 'struct Record **' #include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; /* these arrays are just used to give the parameters to 'insert', to create the 'people' array */ char *names[7]= {"Simon", "Suzie", "Alfred", "Chip", "John", "Tim", "Harriet"}; int ages[7]= {22, 24, 106, 6, 18, 32, 24}; /* declare your struct for a person here */ /* */ typedef struct Record{ char *names; int ages; struct Record *next; } Record; char getname(Record *names){ return names; } int getage(Record *ages){ return ages; } static void insert (Record *p, char *s, int n) { //p[(*)] = malloc(sizeof(person)); /*static int nextfreeplace = 0;*/ Record *headptr = NULL; while(!reached_eof(p)){ /* allocate heap space for a record */ ptr =(Record*) malloc(sizeof(Record)); if(ptr == NULL){ abort(); printf("memory allocation fail"); exit(1); } else{ printf("memory allocation to person - %s - \n", s); } ptr-&gt;name = getname(p); ptr-&gt;age = getage(p); /* link new object into the list */ ptr-&gt;next = headptr; headptr = ptr; } } int main( int argc, char **argv) { /* declare nextinsert */ int = 0; /* declare the people array here */ Record *p, *headptr; headptr = NULL; //insert the members and age into the unusage array. for ( int i=0 ; i &lt; 7; i++) { insert (p, names[i], ages[i]); /* do not dereference the pointer */ } /* print out a line before printing the names and ages */ printf("\n"); /* print the people array here*/ for (int i=0; i &lt; 7; i++) { printf("The name is: %s, the age is:%i\n", p[i]-&gt;names, p[i]-&gt;ages); } /* This is the third loop for call free to release the memory allocated by malloc */ /* the free()function deallocate the space pointed by ptr. */ for(int i=0; i&lt;7;i++){ free(p[i]); } } </code></pre>
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