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Questions - gcc-warning

Why I got a warning when I pass 2D array in function with constant parameter whilst in 1D everything is normal?

I have the following two similar codes Snippet 1: #include <stdio.h> #include <stdlib.h> #include <string.h> #define W 5 #define N 9 void print_w(const char x[W] [N+1]); int main...
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George Verouchis

c

gcc

gcc-warning

Votes: 0

Answers: 1

Latest Answer

This is a defect in the C standard; a pointer to an array of char is not compatible with a pointer to an array of const char and may not be passed (with defined behavior) as an argument for a paramete...
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Eric Postpischil

Why there is unused-but-set variable-warning with pointers

I have the following code: #include <iostream> class Test { public: Test(int i) { initialize(i); } void initialize(int i) { std::cout<<"...
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trycity

c++11

g++

compiler-warnings

gcc-warning

Votes: 0

Answers: 1

Latest Answer

The key thing to realize here is that you actually have FOUR objects in your code -- two instances of the class Test and two pointers. The instances of Test don't have names (they're created with new...
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Chris Dodd

conversion from &#39;long long unsigned int&#39; to &#39;long long unsigned int:40&#39; changes value from &#39;0xFFFFFFFFFFFFFFFF&#39; to &#39;0xFFFFFFFFFF&#39; [-Werror=overflow]

I have this example code that throws an error when I try to fix one of the GCC warnings #include <stdint.h> // typedef union someStruct { uint64_t All; struct { uint64_t Foo : 4...
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BitsBitsBits

c

gcc

gcc-warning

Votes: 0

Answers: 1

Latest Answer

Your #define for bits_40 should look like this: #define bits_40 (((bits){.All = -1)).fourtyBits) You could also just do: #define bits_40 ((1ULL << 40) - 1) and skip the bits struct entirely. O...
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SGeorgiades

expected &#39;const GLchar * const*&#39; {aka &#39;const char * const*&#39;} but argument is of type &#39;char **&#39;

I tried to convert my old openGl code (written in c++) to c, I always encounter this weird warning about an incompatible pointer type when I try to use glCompileShader() char *buffer = 0; long length;...
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randomguy

c

pointers

opengl

gcc-warning

glad

Votes: 0

Answers: 1

Latest Answer

I don't know what this warning means, if it is important, or if I can ignore it. It means the &buffer is a char ** (pointer to char pointer) but the function expects a char const * const * (poin...
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Bill Morgan

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