C + + Inserts a substring in a string + infers whether the string consists of spaces

Example3.cpp: Defines the entry point of the console application. #include "StdAfx.h" #include <string> #include <iostream>using namespace Std;int main (void) {string str,str1 , Str2;int index;//infers whether the intercepted substring is composed of blanks str= "   CJC is a master."; Str1= "CJC is a master."; Index=str.find ("CJC"); Str.assign (Str.c_str (), index); if (Str.find_first_not_of (") ==-1) {cout<<" The string is Constructed of blanks ... "<<ENDL;} Else{cout<<str<<endl;} Insert substring Index=str1.find ("Master") in string, Str2=str1.substr (index), Str1.assign (Str1.c_str (), index), str=str1+ "good" + Str2;cout<<str<<endl;system ("pause"); return 0;}

C + + Inserts a substring in a string + infers whether the string consists of spaces