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Questions - function-definition

Why does an invalid use of C function compile fine without any warnings?

I'm more like C++ than C, but this simple example of code is big surprise for me: int foo() { return 3; } int main() { int x; foo(&x); return x; } https://godbolt.org/z/4ov9nTzjM...
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Marek R

c

function-call

function-definition

function-declaration

Votes: 0

Answers: 4

Latest Answer

This function is 100% correct. In the C language int foo() { means: define function foo returning int and taking unspecified number of parameters. Your confusion comes from C++ plus where int foo(void...
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0___________

Getting no output why is that?

I', learning C and I'm getting no output for some reason, probably I don't return as I should but how I should? (described the problem in the comments below :D) Any help is appreciated! #include <...
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Patton13

c

scope

c-strings

function-definition

toupper

Votes: 0

Answers: 2

Latest Answer

You declared within the function a local variable length array that will not be alive after exiting the function char str_out[strlen(string) + 1]; So your program has undefined behavior. If the funct...
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Vlad from Moscow

runtime error: member access within null pointer of type &#39;struct ListNode&#39; [solution.c]

I am trying to solve the merge k sorted lists question on leetcode using the non-recursive solution. When I run the code it gives the error as mentioned below. Can you help me to solve the problem? Er...
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Sasank Konakalla

c

merge

linked-list

singly-linked-list

function-definition

Votes: 0

Answers: 2

Latest Answer

For starters even the first two lines produce a memory leak result = (struct ListNode *)malloc(sizeof(struct ListNode)); result = NULL; This while loop while (lists){ can be an infinite loop because...
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Vlad from Moscow

When i use my code in local vscode its giving only 63 as answer but when i use a different online complier it works fine

This is a Luhn algorithm code and it works fine in an online complier but when I use it in my local vscode it is only giving 63 as output. I dont know if its a memory issue as it late long variable. i...
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Karma0o7

c

integer

long-integer

function-definition

luhn

Votes: 0

Answers: 1

Latest Answer

The result depends on the size of the type long int that can be equal either to the size of the type int or to the size of the type long long int. So use the type long long int instead of the type lon...
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Vlad from Moscow

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