定义函数, 实现字符串中某个字符的查找, 并返回字符的下标或 -1

day9/case5.cpp

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+// 定义函数, 实现字符串中某个字符的查找, 并返回字符的下标或 -1
+#include <iostream>
+
+using namespace std;
+int findCharAt(char str[], int size, char ch)
+{
+    for (int i = 0; i < size; i++)
+    {
+        if (str[i] == ch)
+            return i;
+        else if (str[i] == '\0' && str[i] != ch)
+            return -1;
+    }
+}
+
+int main()
+{
+    char str[] = "abcdefg";
+    char ch;
+    cout << "请输入要查找的字符: ";
+    cin >> ch;
+    int size = sizeof(str) / sizeof(str[0]);
+    int index = findCharAt(str, size, ch);
+    cout << "下标为: " << index << endl;
+    return 0;
+}