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POPassing variables to a function: scope and when to use & and *?
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  1. POPassing variables to a function: scope and when to use & and *?
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    copied!<pre><code>#include "stdafx.h" #include "stdio.h" #include "math.h" #include "stdlib.h" void test (int a,int *b, int result[], int serie[]); int main() { int *serie = malloc(sizeof(int)); int result[20], a,b, i; a=0; b=0; for (i = 0; i &lt; 20; i++) { result[i]=i+10; serie[i]=rand(); printf("result is %d \n",result[i]); } test(a,&amp;b,result,serie); printf("value of a inside main %d \n",a); printf("value of b inside main %d \n",b); for (i = 0; i &lt; 20; i++) { printf("value of result inside main is %d and of serie is %d \n",result[i],serie[i]); } getchar(); return 0; } void test(int a, int *b, int result[], int serie[]) { int i; a=13; *b=14; printf("value of a inside the function %d \n",a); printf("value of b inside the function %d \n",*b); for (i = 0; i &lt; 20; i++) { result[i]=result[i]*2; serie[i]=7; printf("value of result inside the function is %d and of serie is %d\n",result[i],serie[i]); } } </code></pre> <p>Basically, all this code does is seeing the scope of the variables, I wrote it to help myself I thought as to change the value of the integer inside <code>main</code> with a function (see <code>int b</code>) You have to call it with <code>&amp;b</code> (<code>test(a,&amp;b,result,serie);</code>) and then inside the function <code>*b</code>. So I was trying those kind of operations <em>&amp;</em>* with the arrays but They did not work.</p> <p>It seems all you have to do It is write the array <code>void test(... int result[],int serie[])</code> and to call the function just put the name with no brackets at all: <code>test(...,result,serie);</code> am I right?</p> <p>What if I only want to change the arrays inside the function like with variable <code>a</code>?</p>
 

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