字符串——首字符大写

#include <stdio.h>
#include <iostream>
#include <string>
#include <cstring>

using namespace std;

int main(){
    string str;
    getline(cin,str);
    for(int i = 0; i < str.size();i++){
        if(i == 0) str[i] -= 32;
        if(i > 0 && str[i-1] == ' ') str[i] -= 32;
    
    }
    cout<<str<<endl;
    
    return 0;      
}