VSCode - identifier "size_t" is undefined - c

Question

I'm writing a code for a simple program that calculates the perimeter of a polygon when its given the amount of sides it has and the length of each side as homework, problem is that when I do for (size_t i = 0; i < sidesnumber; i++) it gives me an error on size_t saying "identifier "size_t" is undefined". I have already tried also including the library stddef.h but it stays the same.
This is the whole code:
#include <stdio.h>
int sidesnumber = 0;
int sides[100];
int results;
main()
{
printf("Number of Sides\n");
sidesnumber = getchar();
sidesnumber -= 48;
for (size_t i = 0; i < sidesnumber; i++)
{
/* code */
getchar();
sides[i] = getchar();
sides[i] -= 48;
}
for (size_t i = 0; i < sidesnumber; i++)
{
/* code */
results += sides[i];
}
printf("The perimeter is:%d", results);
}
I'm using MinGW on Windows 10.
Code of all the .jsons I'm currently using
tasks.json
{
"version": "2.0.0",
"tasks": [
{
"label": "Compile C File",
"type": "shell",
"command": "gcc",
"args": [
"-g",
"${file}",
"-o",
"${workspaceRoot}\\${fileBasename}.exe"
],
"group": {
"kind": "build",
"isDefault": true
}
},
{
"label": "Run C File",
"type": "shell",
"command": ".\\${fileBasename}.exe"
},
{
"type": "shell",
"label": "gcc.exe build active file",
"command": "C:/mingw64/bin/gcc.exe",
"args": [
"-g",
"${file}",
"-o",
"${fileDirname}\\${fileBasenameNoExtension}.exe"
],
"options": {
"cwd": "C:/mingw64/bin"
}
}
]
}
launch.json
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "gcc.exe build and debug active file",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceRoot}\\${fileBasename}.exe",
"args": [],
"stopAtEntry": false,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": false,
"MIMode": "gdb",
"miDebuggerPath": "C:\\mingw64\\bin\\gdb.exe",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
],
"preLaunchTask": "Compile C File"
}
]
}
c_cpp_properties.json
{
"configurations": [
{
"name": "Win32",
"browse": {
"path": [
"${workspaceFolder}",
"C:\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\8.1.0\\include"
],
"limitSymbolsToIncludedHeaders": true
},
"includePath": [
"${workspaceFolder}",
"C:/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++/tr1",
"C:/mingw64/lib/gcc/x86_64-w64-mingw32/8.1.0/include/c++",
"C:/mingw64/x86_64-w64-mingw32/include"
],
"defines": [
"_DEBUG",
"UNICODE",
"_UNICODE"
],
"cStandard": "c11",
"cppStandard": "c++17",
"intelliSenseMode": "gcc-x64",
"compilerPath": "C:/mingw64/bin/gcc.exe"
},
{
"name": "Win32",
"includePath": [
"${workspaceFolder}/**"
],
"defines": [
"_DEBUG",
"UNICODE",
"_UNICODE"
],
"compilerPath": "C:/mingw64/bin/gcc.exe",
"cStandard": "c11",
"cppStandard": "c++17",
"intelliSenseMode": "gcc-x64"
},
{
"name": "Test",
"includePath": [
"${workspaceFolder}/**",
"C:\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\8.1.0\\include\\c++\\tr1",
"C:\\mingw64\\lib\\gcc\\x86_64-w64-mingw32\\8.1.0\\include\\c++",
"C:\\mingw64\\x86_64-w64-mingw32\\include"
],
"defines": [
"_DEBUG",
"UNICODE",
"_UNICODE"
],
"compilerPath": "C:\\mingw64\\bin\\gcc.exe",
"cStandard": "c11",
"cppStandard": "c++17",
"intelliSenseMode": "gcc-x64",
"compilerArgs": [],
"browse": {
"path": [
"${workspaceFolder}/**"
],
"limitSymbolsToIncludedHeaders": true
}
}
],
"version": 4
}

Answer 1

If you are only concerned about the squiggles under size_t in vscode, you can use std::size_t instead.