如何替换字符串中的字符？

string title = "I like to code."
char arr[title.size() + 1];
strcpy(arr, title.c_str());
int i = 0;
while(arr[1][i] != 0){
	if(arr[1][i] == ' '){
		arr[1][i] = '-';
	};
	i++;
};
string name(arr);
return name;

这是我的代码已经捣碎了。正如您所看到的，我正在将一个字符串转换为一个数组，通过char遍历数组char，在我继续使用破折号替换空格，然后将最终结果转换回字符串。问题是编译器会为'while'语句抛出'错误：数组下标的无效类型'以及它后面的两行。我怎样才能解决这个问题？谢谢，全部！



我尝试了什么：



我有尝试使用 #include< algorithm> 中的 std :: replace 模板，但无济于事。

This is the code that I have mashed together. As you can see, I am converting a string into an array, going through the array char by char, replacing spaces with dashes as I go along, then converting the end result back into a string. The problem is that the compiler throws back 'error: invalid types for array subscript' for the 'while' statement and the two lines after it. How can I fix this? Thanks, all!

What I have tried:

I have tried using the std::replace template from #include <algorithm>, but to no avail.