replace函数

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/* 用正常方法 #include <iostream> #include <string> using namespace std; int main() {     string Oldstr     string str = "我是渣渣辉,我上八十年级";     cout<<str<<endl;     str = str.replace(str.find("渣"),6,"王一行");  //从第一个(渣)的位置开始的三个汉字替换成(王一行)     str = str.replace(str.find("八"),4,"五");  //从第一个(八)的位置开始的两个汉字替换成(五)     //replace函数的     cout<<str;     return 0; }   用begin #include <iostream> #include <string> using namespace std; int main() {     string str = "he is@ a@ good boy";     //cout<<str<<endl;     str = str.replace(str.begin(),str.begin()+5,"#");  //从#替换从begin位置开始的5个字符     cout<<str<<endl;     return 0; }   用指针 #include <iostream> #include <string> using namespace std; int main() {     string str = "he is@ a@ good boy";     char *str1 = "12345";     str = str.replace(0,5,str1);  //从#替换从begin位置开始的5个字符     cout<<str<<endl;     return 0; }*/     #include <iostream> #include <string> using namespace std; int main() {     string str = "he is@ a@ good boy";     char *str1 = "12345";     str = str.replace(0,6,str1,4);  //用str1替换从begin位置开始的5个字符     cout<<str<<endl;     return 0; }