diff --git a/lab22/lab22.sln b/lab22/lab22.sln
new file mode 100644
index 0000000..4bbcf07
--- /dev/null
+++ b/lab22/lab22.sln
@@ -0,0 +1,31 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.11.35327.3
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "lab22", "lab22.vcxproj", "{F4BF5762-C98D-476B-B1F7-72225BD2B524}"
+EndProject
+Global
+ GlobalSection(SolutionConfigurationPlatforms) = preSolution
+ Debug|x64 = Debug|x64
+ Debug|x86 = Debug|x86
+ Release|x64 = Release|x64
+ Release|x86 = Release|x86
+ EndGlobalSection
+ GlobalSection(ProjectConfigurationPlatforms) = postSolution
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Debug|x64.ActiveCfg = Debug|x64
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Debug|x64.Build.0 = Debug|x64
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Debug|x86.ActiveCfg = Debug|Win32
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Debug|x86.Build.0 = Debug|Win32
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Release|x64.ActiveCfg = Release|x64
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Release|x64.Build.0 = Release|x64
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Release|x86.ActiveCfg = Release|Win32
+ {F4BF5762-C98D-476B-B1F7-72225BD2B524}.Release|x86.Build.0 = Release|Win32
+ EndGlobalSection
+ GlobalSection(SolutionProperties) = preSolution
+ HideSolutionNode = FALSE
+ EndGlobalSection
+ GlobalSection(ExtensibilityGlobals) = postSolution
+ SolutionGuid = {4D06AB46-6BD4-4DEE-A631-D2FBE521EBB7}
+ EndGlobalSection
+EndGlobal
diff --git a/lab22/lab22.vcxproj b/lab22/lab22.vcxproj
new file mode 100644
index 0000000..f6b0145
--- /dev/null
+++ b/lab22/lab22.vcxproj
@@ -0,0 +1,135 @@
+
+
+
+
+ Debug
+ Win32
+
+
+ Release
+ Win32
+
+
+ Debug
+ x64
+
+
+ Release
+ x64
+
+
+
+ 17.0
+ Win32Proj
+ {f4bf5762-c98d-476b-b1f7-72225bd2b524}
+ lab22
+ 10.0
+
+
+
+ Application
+ true
+ v143
+ Unicode
+
+
+ Application
+ false
+ v143
+ true
+ Unicode
+
+
+ Application
+ true
+ v143
+ Unicode
+
+
+ Application
+ false
+ v143
+ true
+ Unicode
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+ Level3
+ true
+ WIN32;_DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+
+
+
+
+ Level3
+ true
+ true
+ true
+ WIN32;NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+ true
+ true
+
+
+
+
+ Level3
+ true
+ _DEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+
+
+
+
+ Level3
+ true
+ true
+ true
+ NDEBUG;_CONSOLE;%(PreprocessorDefinitions)
+ true
+
+
+ Console
+ true
+ true
+ true
+
+
+
+
+
+
+
+
+
\ No newline at end of file
diff --git a/lab22/lab22.vcxproj.filters b/lab22/lab22.vcxproj.filters
new file mode 100644
index 0000000..669bc4e
--- /dev/null
+++ b/lab22/lab22.vcxproj.filters
@@ -0,0 +1,22 @@
+
+
+
+
+ {4FC737F1-C7A5-4376-A066-2A32D752A2FF}
+ cpp;c;cc;cxx;c++;cppm;ixx;def;odl;idl;hpj;bat;asm;asmx
+
+
+ {93995380-89BD-4b04-88EB-625FBE52EBFB}
+ h;hh;hpp;hxx;h++;hm;inl;inc;ipp;xsd
+
+
+ {67DA6AB6-F800-4c08-8B7A-83BB121AAD01}
+ rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms
+
+
+
+
+ Исходные файлы
+
+
+
\ No newline at end of file
diff --git a/lab22/main.c b/lab22/main.c
new file mode 100644
index 0000000..1bfd69c
--- /dev/null
+++ b/lab22/main.c
@@ -0,0 +1,133 @@
+#define _CRT_SECURE_NO_WARNINGS
+#include
+#include
+#include
+#include
+
+int strlen_my_arr(char str[]) {
+ int len = 0;
+ while (str[len] != '\0') {
+ len++;
+ }
+ return len;
+}
+
+int strlen_my_ptr(char* str_ptr) {
+ char* str_ptr_old = str_ptr;
+ while (*str_ptr != '\0') {
+ str_ptr++;
+ }
+ return (int)(str_ptr - str_ptr_old);
+}
+
+int strcmp_my_arr(char str1[], char str2[]) {
+ int i = 0;
+ while (str1[i] != '\0' && str2[i] != '\0' && str1[i] == str2[i]) {
+ i++;
+ }
+ return str1[i] - str2[i];
+}
+
+int strcmp_my_ptr(char* str1, char* str2) {
+ while (*str1 != '\0' && *str2 != '\0' && *str1 == *str2) {
+ str1++;
+ str2++;
+ }
+ return *str1 - *str2;
+}
+
+char* strcpy_my_arr(char dest[], char source[]) {
+ int i = 0;
+ while (source[i] != '\0') {
+ dest[i] = source[i];
+ i++;
+ }
+ dest[i] = '\0';
+ return dest;
+}
+
+char* strcpy_my_ptr(char* dest, char* source) {
+ while (*source != '\0') {
+ *dest = *source;
+ dest++;
+ source++;
+ }
+ *dest = '\0';
+ return dest;
+}
+
+char* strcat_my_ptr(char* destination, const char* source) {
+ while (*destination != '\0') {
+ destination++;
+ }
+ while (*source != '\0') {
+ *destination = *source;
+ destination++;
+ source++;
+ }
+ return destination;
+}
+
+char* strchr_my_arr(const char str[], int ch) {
+ int i = 0;
+ while (str[i] != '\0') {
+ if (str[i] == (char)ch) {
+ return &str[i];
+ }
+ i++;
+ }
+ return NULL;
+}
+
+char* strchr_my_ptr(const char* str, int ch) {
+ while (*str != '\0') {
+ if (*str == (char)ch) {
+ return str;
+ }
+ str++;
+ }
+ return NULL;
+}
+
+int main() {
+ char test1[] = "1234567";
+ char test2[] = "12345699";
+ printf("test1 string = \"%s\"\n", test1);
+ printf("test2 string = \"%s\"\n", test2);
+ printf(" strlen = %d\n", (int)strlen(test1));
+ printf("strlen_my_arr = %d\n", strlen_my_arr(test1));
+ printf("strlen_my_ptr = %d\n\n", strlen_my_ptr(test1));
+
+ printf(" strcmp = %d\n", strcmp(test1, test2));
+ printf("strcmp_my_arr = %d\n", strcmp_my_arr(test1, test2));
+ printf("strcmp_my_ptr = %d\n\n", strcmp_my_ptr(test1, test2));
+
+ char test_strcpy[81];
+ char test_strcpy_my_arr[81];
+ char test_strcpy_my_ptr[81];
+ strcpy(test_strcpy, test2);
+ strcpy_my_arr(test_strcpy_my_arr, test2);
+ strcpy_my_ptr(test_strcpy_my_ptr, test2);
+ printf(" strcopy result = \"%s\"\n", test_strcpy);
+ printf("strcopy_my_arr result = \"%s\"\n", test_strcpy_my_arr);
+ printf("strcopy_my_ptr result = \"%s\"\n", test_strcpy_my_ptr);
+
+ char test_strcat[81] = "abcde";
+ char test_strcat_my_ptr[81] = "abcde";
+ strcat(test_strcat, test2);
+ strcat_my_ptr(test_strcat_my_ptr, test2);
+ printf(" strcat result = \"%s\"\n", test_strcat);
+ printf("strcat_my_ptr result = \"%s\"\n\n", test_strcat_my_ptr);
+
+ char test3[] = "qazwsxedccdexswzaq";
+ printf("test3 string = \"%s\"\n", test3);
+
+ char* strchr_res = strchr(test3, 's');
+ printf(" strchr 's' = {%p} = '%c', index = %d\n", strchr_res, *strchr_res, (int)(strchr_res - test3));
+ char* strchr_my_arr_res = strchr_my_arr(test3, 's');
+ printf("strchr_my_arr_res 's' = {%p} = '%c', index = %d\n", strchr_my_arr_res, *strchr_my_arr_res, (int)(strchr_my_arr_res - test3));
+ char* strchr_my_arr_ptr = strchr_my_ptr(test3, 's');
+ printf("strchr_my_arr_ptr 's' = {%p} = '%c', index = %d\n", strchr_my_arr_ptr, *strchr_my_arr_ptr, (int)(strchr_my_arr_ptr - test3));
+
+ return 0;
+}
\ No newline at end of file