Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Q&A

Welcome to Software Development on Codidact!

Will you help us build our independent community of developers helping developers? We're small and trying to grow. We welcome questions about all aspects of software development, from design to code to QA and more. Got questions? Got answers? Got code you'd like someone to review? Please join us.

Post History

66%
+4 −1
Q&A Invalid memory access when trying to dereference a pointer obtained through a function call

Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6? #include<stdio.h> #include<stdlib.h> int *A...

1 answer  ·  posted 2y ago by dumplings‭  ·  last activity 2y ago by celtschk‭

#5: Post edited by user avatar Alexei‭ · 2021-12-05T07:19:08Z (over 2 years ago)
made the title match the content
  • Question on pointers as return functions.
  • Invalid memory access when trying to dereference a pointer obtained through a function call
#4: Post edited by user avatar Moshi‭ · 2021-12-05T07:10:44Z (over 2 years ago)
Formatted code block
Question on pointers as return functions.
  • Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6?
  • ![Code error](https://software.codidact.com/uploads/U8qbUvf8H6Rb5XyCNoK9m8yj)
  • ![Pop-up error message](https://software.codidact.com/uploads/FfBWyaPMMk331GGGS4qjeyd1)
  • `#include<stdio.h>
  • #include<stdlib.h>
  • int *Add(int *a, int *b){
  • int c = (*a) + (*b);
  • return &c;
  • }
  • int main (){
  • int x=2, y=4;
  • int *Ptr = Add(&x,&y);
  • printf("Sum = %d
  • ",*Ptr);
  • }`
  • Also, how do you even format the above to become a code in Codidact? X'D
  • Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6?
  • ![Code error](https://software.codidact.com/uploads/U8qbUvf8H6Rb5XyCNoK9m8yj)
  • ![Pop-up error message](https://software.codidact.com/uploads/FfBWyaPMMk331GGGS4qjeyd1)
  • ```c
  • #include<stdio.h>
  • #include<stdlib.h>
  • int *Add(int *a, int *b){
  • int c = (*a) + (*b);
  • return &c;
  • }
  • int main (){
  • int x=2, y=4;
  • int *Ptr = Add(&x,&y);
  • printf("Sum = %d
  • ",*Ptr);
  • }
  • ```
#3: Post edited by user avatar dumplings‭ · 2021-12-05T02:22:54Z (over 2 years ago)
  • Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6?
  • ![Code error](https://software.codidact.com/uploads/U8qbUvf8H6Rb5XyCNoK9m8yj)
  • `#include<stdio.h>
  • #include<stdlib.h>
  • int *Add(int *a, int *b){
  • int c = (*a) + (*b);
  • return &c;
  • }
  • int main (){
  • int x=2, y=4;
  • int *Ptr = Add(&x,&y);
  • printf("Sum = %d\n",*Ptr);
  • }`
  • Also, how do you even format the above to become a code in Codidact? X'D
  • Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6?
  • ![Code error](https://software.codidact.com/uploads/U8qbUvf8H6Rb5XyCNoK9m8yj)
  • ![Pop-up error message](https://software.codidact.com/uploads/FfBWyaPMMk331GGGS4qjeyd1)
  • `#include<stdio.h>
  • #include<stdlib.h>
  • int *Add(int *a, int *b){
  • int c = (*a) + (*b);
  • return &c;
  • }
  • int main (){
  • int x=2, y=4;
  • int *Ptr = Add(&x,&y);
  • printf("Sum = %d\n",*Ptr);
  • }`
  • Also, how do you even format the above to become a code in Codidact? X'D
#2: Post edited by user avatar dumplings‭ · 2021-12-05T02:21:08Z (over 2 years ago)
  • Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6?
  • `#include<stdio.h>
  • #include<stdlib.h>
  • int *Add(int *a, int *b){
  • int c = (*a) + (*b);
  • return &c;
  • }
  • int main (){
  • int x=2, y=4;
  • int *Ptr = Add(&x,&y);
  • printf("Sum = %d\n",*Ptr);
  • }`
  • Also, how do you even format the above to become a code in Codidact? X'D
  • Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6?
  • ![Code error](https://software.codidact.com/uploads/U8qbUvf8H6Rb5XyCNoK9m8yj)
  • `#include<stdio.h>
  • #include<stdlib.h>
  • int *Add(int *a, int *b){
  • int c = (*a) + (*b);
  • return &c;
  • }
  • int main (){
  • int x=2, y=4;
  • int *Ptr = Add(&x,&y);
  • printf("Sum = %d\n",*Ptr);
  • }`
  • Also, how do you even format the above to become a code in Codidact? X'D
#1: Initial revision by user avatar dumplings‭ · 2021-12-05T02:19:45Z (over 2 years ago)
Question on pointers as return functions.
Hey, regarding a question on returning pointers as functions, why does my code produce this error & won't print out the sum = 6?

`#include<stdio.h>

#include<stdlib.h>

int *Add(int *a, int *b){ 
    
 int c = (*a) + (*b);     
    return &c;

}

int main (){ 
    
 int x=2, y=4;
  
 int *Ptr = Add(&x,&y); 
   
 printf("Sum = %d\n",*Ptr);

}`

Also, how do you even format the above to become a code in Codidact? X'D