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POCode not running when trying to display pointer values and pointer addresses
 

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  1. POCode not running when trying to display pointer values and pointer addresses
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    <p>I am taking a course in C and just started learning about pointers. I just went to go complete this section's lab and I couldn't get my code to run properly. So I opened up the lab's correct answer code, and then I went through line by line and compared the lab's answer code to my own. Some of my label's are different, but nothing that should be causing any errors.</p> <p>I can't figure out why my code won't run, but the lab's code will. </p> <p>Here is a picture of what happens in xcode when I try to run my code:</p> <p><img src="https://i.stack.imgur.com/nL76h.png" alt="enter image description here"></p> <p>Any help is greatly appreciated.</p> <p>Here is my code that is not working:</p> <pre><code>#include &lt;stdio.h&gt; int main() { int age = 40; float gpa = 3.25; char grade = 'A'; double x = 0.000009; char companyName[20]; printf("The address of age is: %d\n", &amp;age); printf("The size of age is: %lu\n", sizeof(age)); printf("The address of gpa is: %d\n", &amp;gpa); printf("The size of gpa is: %lu\n", sizeof(gpa)); printf("The address of grade is: %d\n", &amp;grade); printf("The size of grade is: %lu\n", sizeof(grade)); printf("The address of x is: %d\n", &amp;x); printf("The size of x is: %lu\n", sizeof(x)); printf("The address of companyName is: %d\n", &amp;companyName); printf("The size of companyName is: %lu\n", sizeof(companyName)); int *pointerIntAge; pointerIntAge = &amp;age; float *pointerFloatGpa; pointerFloatGpa = &amp;gpa; char *pointerCharGrade; pointerCharGrade = &amp;grade; double *pointerDoubleX; pointerDoubleX = &amp;x; char *pointerCharCompanyName; pointerCharCompanyName = &amp;companyName; printf("The value of pointerIntAge is: %d\n", *pointerIntAge); printf("The value of pointerFloatGpa is: %f\n", *pointerFloatGpa); printf("The value of pointerCharGrade is: %c\n", *pointerCharGrade); printf("The value of pointerDoubleX is: %f\n", *pointerDoubleX); printf("The valie of pointerCharCompanyName is: %s\n", *pointerCharCompanyName); printf("The address of pointerIntAge is: %p\n", pointerIntAge); printf("The address of pointerFloatGpa is: %p\n", pointerFloatGpa); printf("The address of pointerCharGrade is: %p\n", pointerCharGrade); printf("The address of pointer DoubleX is: %p\n", pointerDoubleX); printf("The address of pointerCharCompanyName is: %p\n", pointerCharCompanyName); *pointerIntAge+=5; printf("Just added 5 to pointer age\n"); printf("The new value of age is: %d\n", age); printf("The value of age through pointer is: %d\n", *pointerIntAge); return 0; } </code></pre> <p>Here is the lab's code that is working:</p> <pre><code>#include &lt;stdio.h&gt; int main () { int age = 40; float gpa = 3.25; char grade = 'A'; double x = 0.000009; char companyName[20]; printf("Address of age: %d\n", &amp;age); printf("Size of age: %lu\n", sizeof(age)); printf("Address of GPA: %d\n", &amp;gpa); printf("Size of age: %lu\n", sizeof(gpa)); printf("Address of grade: %d\n", &amp;grade); printf("Size of grade: %lu\n", sizeof(grade)); printf("Address of x: %d\n", &amp;x); printf("Size of x: %lu\n", sizeof(x)); printf("Address of companyName: %d\n", &amp;companyName); printf("Size of companyName: %lu\n", sizeof(companyName)); int *pAge; pAge = &amp;age; float *pGpa; pGpa = &amp;gpa; char *pGrade; pGrade = &amp;grade; double *pX; pX = &amp;x; char *pCompanyName; pCompanyName = &amp;companyName; printf("\nValue of Age though pointer: %d", *pAge); printf("\nValue of GPA though pointer: %0.2f", *pGpa); printf("\nValue of Grade though pointer: %c", *pGrade); printf("\nValue of X though pointer: %f", *pX); printf("\nValue of Company Name though pointer: %s\n", *pCompanyName); printf("\nThe address from Age pointer: %p", pAge); printf("\nThe address from Gpa pointer: %p", pGpa); printf("\nThe address from Grade pointer: %p", pGrade); printf("\nThe address from X pointer: %p", pX); printf("\nThe address from companyName pointer: %p\n", pCompanyName); *pAge += 5; //Added 5 to Age through pointer. printf("\nValue of Age: %d", age); printf("\nValue of Age through pointer: %d", *pAge); return 0; } </code></pre>
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    1. USuser3055015
    1. USuser3055015
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    1. COWhat errors are you getting? What's your actual output from *your* code (not the lab's)?
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      1. POCode not running when trying to display pointer values and pointer addresses
      1. USciphermagi
    2. CO@Jonah I just updated my original post with a screenshot of what I'm getting in xcode when trying to run.
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      1. POCode not running when trying to display pointer values and pointer addresses
      1. USuser3055015
 

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