使用另一个子字符串替换 C++ 子字符串
这里我们将了解如何使用另一个子字符串替换子字符串。替换字符串中从字符位置 pos 开始且跨越 len 字符的部分。
replace 函数的结构如下
string& replace (size_t pos, size_t len, const string& str, size_t subpos, size_t sublen);
参数是pos:它是插入点,str:它是字符串对象,len:它包含有关要删除的字符数的信息。
算法
Step 1: Get the main string, and the string which will be replaced. And the match string Step 2: While the match string is present in the main string: Step 2.1: Replace it with the given string. Step 3: Return the modified string
示例代码
#include <iostream> #include <string> using namespace std; int main () { string base = "this is a test string."; string str2 = "n example"; string str3 = "sample phrase"; string str4 = "useful."; string str = base; str.replace(9,5,str2); str.replace(19,6,str3,7,6); str.replace(8,10,"just a"); str.replace(8,6,"a shorty",7); str.replace(22,1,3,'!'); str.replace(str.begin(),str.end()-3,str3); str.replace(str.begin(),str.begin()+6,"replace"); str.replace(str.begin()+8,str.begin()+14,"is coolness",7); str.replace(str.begin()+12,str.end()-4,4,'o'); str.replace(str.begin()+11,str.end(),str4.begin(),str4.end()); cout << str << '\n'; return 0; }
输出
replace is useful.
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