用另一个子字符串替换子字符串C ++
在这里，我们将看到如何用另一个子字符串替换子字符串。它替换了从字符pos开始并跨越len个字符的字符串部分。
替换函数的结构如下：
string& replace (size_t pos, size_t len, const string& str, size_t subpos, size_t sublen);
参数是pos：它是一个插入点，str：它是一个字符串对象，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
范例程式码
#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;}输出结果
replace is useful.