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POSame structure objects memory overlap?
 

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  1. POSame structure objects memory overlap?
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    <pre><code>struct integer { int len; char* str; int* arr; }int1, int2; int main(void) { printf("Please enter 1st number\n"); int1.str= str_input(); int1.len=chars_read-1; int1.arr= func2(int1.len, int1.str); printf(("\%c\n"), *int1.str); printf("Please enter 2nd number\n"); int2.str = str_input(); int2.len=chars_read-1; printf(("\n %c\n"), *int1.str ); int2.arr= func2(int2.len, int2.str); </code></pre> <p>if the input is 4363 and 78596 , the output is 4 and 7 respectively. </p> <p>The output is not 4 and 4. Given that both are different objects, shouldn't both have different memory allocation? </p> <p>Please note: this is NOT a typographical error. I have used the same *int1.str both times. the problem is that although I have made no changes in it, its value is changing. How? I do not think that str_input() can make a difference. </p> <pre><code>char* str_input(void) { char cur_char; char* input_ptr = (char*)malloc(LINE_LEN * sizeof(char)); char input_string[LINE_LEN]; //while ((cur_char = getchar()) != '\n' &amp;&amp; cur_char&lt;='9' &amp;&amp; cur_char&gt;='0' &amp;&amp; chars_read &lt; 10000) for(chars_read=1; chars_read&lt;10000; chars_read++) { scanf("%c", &amp;cur_char); if(cur_char!='\n' &amp;&amp; cur_char&lt;='9' &amp;&amp; cur_char&gt;='0') { input_string[chars_read-1]= cur_char; printf("%c\n", input_string[chars_read-1]); } else{ break; } } input_string[chars_read] = '\n'; input_ptr = &amp;input_string[0]; /* sets pointer to address of 0th index */ return input_ptr; } //chars_read is a global variable. </code></pre> <p>Thanks in advance.</p>
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    1. USLidong Guo
    1. USsidPhoenix
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    1. COPlease show `func2` and `str_input` functions.
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      1. USdasblinkenlight
    2. CO`input_ptr = &input_string[0];` you are returning a pointer to an automatic variable. (and leaking memory)
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      1. USwildplasser
    3. COLearn to format code; it makes a world of difference! Your code here looks bad. And, never use TABs.
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      1. USmeaning-matters
 

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