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Function.h

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+#include<iostream>
+#include<string>
+#include<cmath>
+#include<sstream>
+#include<graphics.h>
+#include<conio.h>
+
+std::string int_to_str(int n) {
+	std::stringstream ss;
+	std::string str;
+	ss << n;
+	ss >> str;
+	return str;
+}
+int str_to_num1(const char*& str) //转换类型
+{
+    if (!(str[0] == '-' || (str[0] >= '0' && str[0] <= '9'))) {
+        return INT_MIN;
+    }
+    int n = 0;
+    while (str[n] != '\0') {
+        n++;
+    }
+    int number = 0;
+    if (str[0] != '-') {
+        for (int i = 0; i < n; i++) {
+            if (!(str[i] >= '0' && str[i] <= '9')) {
+                return INT_MIN;
+            }
+            number += (str[i] - '0') * pow(10, n - i - 1);
+        }
+    }
+    if (str[0] == '-') {
+        for (int i = 1; i < n; i++) {
+            if (!(str[i] >= '0' && str[i] <= '9')) {
+                return INT_MIN;
+            }
+            number += (str[i] - '0') * pow(10, n - i - 1);
+        }
+        number *= -1;
+    }
+    return number;
+}
+int str_to_num(const std::string& str) //转换类型
+{
+    const char* data = str.c_str();
+    int number = str_to_num1(data);
+    return number;
+}
+
+// 无背景贴图
+//void transparentimage3(IMAGE* dstimg, int x, int y, IMAGE* srcimg) //新版png
+//{
+//    HDC dstDC = GetImageHDC(dstimg);
+//    HDC srcDC = GetImageHDC(srcimg);
+//    int w = srcimg->getwidth();
+//    int h = srcimg->getheight();
+//    BLENDFUNCTION bf = { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA };
+//    AlphaBlend(dstDC, x, y, w, h, srcDC, 0, 0, w, h, bf);
+//}
+
+
+#pragma once