{"id":200880,"date":"2024-03-02T13:34:14","date_gmt":"2024-03-02T13:34:14","guid":{"rendered":"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/"},"modified":"2024-03-02T13:34:14","modified_gmt":"2024-03-02T13:34:14","slug":"how-to-change-pointer-value-in-c","status":"publish","type":"post","link":"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/","title":{"rendered":"How to change pointer value in C?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_62 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#How_to_change_pointer_value_in_C\" title=\"How to change pointer value in C?\">How to change pointer value in C?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#1_Can_you_change_the_memory_address_a_pointer_is_pointing_to_in_C\" title=\"1. Can you change the memory address a pointer is pointing to in C?\">1. Can you change the memory address a pointer is pointing to in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#2_What_happens_if_you_assign_a_new_value_to_a_null_pointer_in_C\" title=\"2. What happens if you assign a new value to a null pointer in C?\">2. What happens if you assign a new value to a null pointer in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#3_Is_it_possible_to_change_the_pointer_address_itself_in_C\" title=\"3. Is it possible to change the pointer address itself in C?\">3. Is it possible to change the pointer address itself in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#4_Can_you_change_the_type_of_the_pointer_in_C\" title=\"4. Can you change the type of the pointer in C?\">4. Can you change the type of the pointer in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#5_How_do_you_change_the_value_of_a_pointer_to_a_string_in_C\" title=\"5. How do you change the value of a pointer to a string in C?\">5. How do you change the value of a pointer to a string in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#6_What_happens_if_you_try_to_dereference_a_null_pointer_in_C\" title=\"6. What happens if you try to dereference a null pointer in C?\">6. What happens if you try to dereference a null pointer in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#7_Can_you_change_the_value_of_a_pointer_to_a_constant_in_C\" title=\"7. Can you change the value of a pointer to a constant in C?\">7. Can you change the value of a pointer to a constant in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#8_How_do_you_change_the_value_of_a_pointer_to_a_dynamically_allocated_memory_in_C\" title=\"8. How do you change the value of a pointer to a dynamically allocated memory in C?\">8. How do you change the value of a pointer to a dynamically allocated memory in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#9_Is_it_possible_to_change_the_value_of_a_pointer_to_a_function_in_C\" title=\"9. Is it possible to change the value of a pointer to a function in C?\">9. Is it possible to change the value of a pointer to a function in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#10_How_do_you_change_the_value_of_a_pointer_to_an_array_in_C\" title=\"10. How do you change the value of a pointer to an array in C?\">10. How do you change the value of a pointer to an array in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#11_What_happens_if_you_try_to_change_the_value_of_a_pointer_that_has_been_freed_in_C\" title=\"11. What happens if you try to change the value of a pointer that has been freed in C?\">11. What happens if you try to change the value of a pointer that has been freed in C?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#12_Can_you_change_the_value_of_a_pointer_to_a_constant_string_in_C\" title=\"12. Can you change the value of a pointer to a constant string in C?\">12. Can you change the value of a pointer to a constant string in C?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"How_to_change_pointer_value_in_C\"><\/span>How to change pointer value in C?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>To change the value of a pointer in C, you simply need to dereference the pointer and assign a new value to it. Here&#8217;s an example:<\/p>\n<p>&#8220;`c<br \/>\nint num = 10;<br \/>\nint *ptr = &num; \/\/ pointer points to num<br \/>\n*ptr = 20; \/\/ changing the value of num through the pointer<br \/>\n&#8220;`<\/p>\n<p>In the above code snippet, `*ptr = 20;` changes the value of `num` to 20 through the pointer `ptr`.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Can_you_change_the_memory_address_a_pointer_is_pointing_to_in_C\"><\/span>1. Can you change the memory address a pointer is pointing to in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No, you cannot change the memory address a pointer is pointing to directly. However, you can change the value stored in that memory location.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_What_happens_if_you_assign_a_new_value_to_a_null_pointer_in_C\"><\/span>2. What happens if you assign a new value to a null pointer in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Assigning a value to a null pointer in C will result in undefined behavior, as you are trying to access memory that does not exist.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Is_it_possible_to_change_the_pointer_address_itself_in_C\"><\/span>3. Is it possible to change the pointer address itself in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No, it is not possible to change the address of a pointer itself in C. Pointers store memory addresses and cannot be changed.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_Can_you_change_the_type_of_the_pointer_in_C\"><\/span>4. Can you change the type of the pointer in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can change the type of a pointer in C through type casting. However, it is important to ensure that the new type is compatible with the data being pointed to.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"5_How_do_you_change_the_value_of_a_pointer_to_a_string_in_C\"><\/span>5. How do you change the value of a pointer to a string in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To change the value of a pointer to a string in C, you can simply assign the memory address of the string to the pointer using the address-of operator.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"6_What_happens_if_you_try_to_dereference_a_null_pointer_in_C\"><\/span>6. What happens if you try to dereference a null pointer in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Dereferencing a null pointer in C will result in a segmentation fault or a crash, as you are trying to access memory that does not exist.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"7_Can_you_change_the_value_of_a_pointer_to_a_constant_in_C\"><\/span>7. Can you change the value of a pointer to a constant in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No, you cannot change the value of a pointer to a constant in C, as constants are read-only and cannot be modified.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"8_How_do_you_change_the_value_of_a_pointer_to_a_dynamically_allocated_memory_in_C\"><\/span>8. How do you change the value of a pointer to a dynamically allocated memory in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To change the value of a pointer to dynamically allocated memory in C, you can use functions like `malloc()` or `calloc()` to allocate memory and assign the address to the pointer.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"9_Is_it_possible_to_change_the_value_of_a_pointer_to_a_function_in_C\"><\/span>9. Is it possible to change the value of a pointer to a function in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can change the value of a pointer to a function in C by assigning the address of the function to the pointer using the address-of operator.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"10_How_do_you_change_the_value_of_a_pointer_to_an_array_in_C\"><\/span>10. How do you change the value of a pointer to an array in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>To change the value of a pointer to an array in C, you can assign the memory address of the array or a specific element in the array to the pointer using the address-of operator.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"11_What_happens_if_you_try_to_change_the_value_of_a_pointer_that_has_been_freed_in_C\"><\/span>11. What happens if you try to change the value of a pointer that has been freed in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Attempting to change the value of a pointer that has been freed in C will result in undefined behavior, as the memory has been deallocated and should not be accessed.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"12_Can_you_change_the_value_of_a_pointer_to_a_constant_string_in_C\"><\/span>12. Can you change the value of a pointer to a constant string in C?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you can change the value of a pointer to a constant string in C by assigning the memory address of the constant string to the pointer. However, you cannot modify the contents of the constant string through the pointer.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to change pointer value in C? To change the value of a pointer in C, you simply need to dereference the pointer and assign a new value to it. Here&#8217;s an example: &#8220;`c int num = 10; int *ptr = &num; \/\/ pointer points to num *ptr = 20; \/\/ changing the value of &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"How to change pointer value in C?\" class=\"read-more button\" href=\"https:\/\/namso-gen.co\/blog\/how-to-change-pointer-value-in-c\/#more-200880\">Read more<span class=\"screen-reader-text\">How to change pointer value in C?<\/span><\/a><\/p>\n","protected":false},"author":51,"featured_media":107420,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86279],"tags":[],"class_list":["post-200880","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-learn","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to change pointer value in C?<\/title>\n<meta name=\"description\" content=\"How to change pointer value in C? 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To change the value of a pointer in C, you simply need to dereference the pointer and assign a new value to it. 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