Перешел к препроцессору, заменил значения констант

.vs/ZagolovochnieFaily/v17/DocumentLayout.backup.json

@@ -9,6 +9,9 @@
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@@ -18,12 +21,23 @@
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               "$type": "Bookmark",
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@@ -32,7 +46,7 @@
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@@ -43,9 +57,9 @@
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.vs/ZagolovochnieFaily/v17/DocumentLayout.json

@@ -2,13 +2,16 @@
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@@ -18,7 +21,7 @@
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+          "SelectedChildIndex": 3,
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@@ -26,26 +29,37 @@
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ZagolovochnieFaily/Program.c

@@ -1,6 +1,13 @@
 #define _CRT_SECURE_NO_WARNINGS
 #include "arithmetic.h" //Âûçûâàþ ìîé çàãîëîâî÷íûé ôàéë
 
+
+#define STR1 "Hello, "
+#define STR2 "world!"
+#define STR_TO_CONVERT "213.124"
+#define PRECISION "%.2f"
+#define FULL_PRECISION "%.3f"
+
 int main()
 {
 	system("chcp 1251>null");
@@ -14,15 +21,13 @@ int main()
 	printf("Óìíîæåíèå: %d * %d = %d\n", num1, num2, umn(num1, num2));
 
 	if (num2 != 0) {
-		printf("Äåëåíèå: %d / %d = %.2f\n", num1, num2, del(num1, num2));
+		printf("Äåëåíèå: %d / %d = " PRECISION "\n", num1, num2, del(num1, num2));
 	}
 	else {
 		printf("Äåëåíèå íà íîëü íåâîçìîæíî!\n");
 	}
 
-	char* str1 = "Hello, ";
-	char* str2 = "world!";
-	char* result = concantenate_strings(str1, str2);
+	char* result = concantenate_strings(STR1, STR2);
 	printf("Îáúåäèíåííàÿ ñòðîêà: %s\n", result);
 	free(result);
 	//÷èñëî â ñòðîêó
@@ -30,10 +35,8 @@ int main()
 	printf("×èñëî %d êàê ñòðîêà: %s\n", num1, num_str);
 	free(num_str);
 	//ñòðîêà â ÷èñëî
-	const char* str_num = "4.12";
-	const char* endptr;
-	int number = string_to_int(str_num, &endptr);
-	printf("Ñòðîêà \"%s\" êàê ÷èñëî: %d\n", str_num, number);
+	double number = string_to_double(STR_TO_CONVERT);
+	printf("Ïðåîáðàçîâàííîå çíà÷åíèå: " FULL_PRECISION "\n", number);
 	return 0;
 }
 

ZagolovochnieFaily/arithmetic.h

@@ -51,8 +51,10 @@ char* int_to_string(int num) {
 	return str;
 }
 
-int string_to_int(const char* str, const char* endptr) {
-	return strtol(str, &endptr, 10); //Ïðåîáðàçóþ ñòðîêó â ÷èñëî
+double string_to_double(const char* str) {
+	char* endptr;
+	double value = strtod(str, &endptr);
+	return value;
 }
 #endif
 

ZagolovochnieFaily/x64/Debug/ZagolovochnieFaily.log

@@ -1,4 +1,2 @@
   Program.c
-D:\Pavlov\МДК 01.04 Мухин\ZagolovochnieFaily\ZagolovochnieFaily\Program.c(35,38): warning C4047: функция: "const char *" отличается по уровням косвенного обращения от "const char **"
-D:\Pavlov\МДК 01.04 Мухин\ZagolovochnieFaily\ZagolovochnieFaily\Program.c(35,38): warning C4024: string_to_int: различные типы для формального и фактического параметров 2
   ZagolovochnieFaily.vcxproj -> D:\Pavlov\МДК 01.04 Мухин\ZagolovochnieFaily\x64\Debug\ZagolovochnieFaily.exe