/*
 *用str替換指定字符串從起始位置pos開始長度為len的字符 
 *string& replace (size_t pos, size_t len, const string& str); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 line = line.replace(line.find("@"), 1, ""); //從第一個@位置替換第一個@為空 
 cout << line << endl; 
 return 0; 
} 

/*
 *用str替換 迭代器起始位置 和 結束位置 的字符 
 *string& replace (const_iterator i1, const_iterator i2, const string& str); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 line = line.replace(line.begin(), line.begin()+6, ""); //用str替換從begin位置開始的6個字符 
 cout << line << endl; 
 return 0; 
} 

/*
 *用substr的指定子串（給定起始位置和長度）替換從指定位置上的字符串 
 *string& replace (size_t pos, size_t len, const string& str, size_t subpos, size_t sublen); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 string substr = "12345"; 
 line = line.replace(0, 5, substr, substr.find("1"), 3); //用substr的指定子串（從1位置數(shù)共3個字符）替換從0到5位置上的line 
 cout << line << endl; 
 return 0; 
} 

/*
 *用str替換從指定位置0開始長度為5的字符串 
 *string& replace(size_t pos, size_t len, const char* s); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 char* str = "12345"; 
 line = line.replace(0, 5, str); //用str替換從指定位置0開始長度為5的字符串 
 cout << line << endl; 
 return 0; 
} 

/*
 *用str替換從指定迭代器位置的字符串 
 *string& replace (const_iterator i1, const_iterator i2, const char* s); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 char* str = "12345"; 
 line = line.replace(line.begin(), line.begin()+9, str); //用str替換從指定迭代器位置的字符串 
 cout << line << endl; 
 return 0; 
} 

/*
 *用s的前n個字符替換從開始位置pos長度為len的字符串 
 *string& replace(size_t pos, size_t len, const char* s, size_t n); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 char* str = "12345"; 
 line = line.replace(0, 9, str, 4); //用str的前4個字符替換從0位置開始長度為9的字符串 
 cout << line << endl; 
 return 0; 
} 

/*
 *用s的前n個字符替換指定迭代器位置(從i1到i2)的字符串 
 *string& replace (const_iterator i1, const_iterator i2, const char* s, size_t n); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 char* str = "12345"; 
 line = line.replace(line.begin(), line.begin()+9, str, 4); //用str的前4個字符替換指定迭代器位置的字符串 
 cout << line << endl; 
 return 0; 
} 

/* 

*用重復n次的c字符替換從指定位置pos長度為len的內(nèi)容 
 *string& replace (size_t pos, size_t len, size_t n, char c); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 char c = '1'; 
 line = line.replace(0, 9, 3, c); //用重復3次的c字符替換從指定位置0長度為9的內(nèi)容 
 cout << line << endl; 
 return 0; 
} 

/*
 *用重復n次的c字符替換從指定迭代器位置（從i1開始到結束）的內(nèi)容 
 *string& replace (const_iterator i1, const_iterator i2, size_t n, char c); 
 */ 
int main() 
{ 
 string line = "this@ is@ a test string!"; 
 char c = '1'; 
 line = line.replace(line.begin(), line.begin()+9, 3, c); //用重復3次的c字符替換從指定迭代器位置的內(nèi)容 
 cout << line << endl; 
 return 0; 
}