题解 | #首字母大写#

//整个字符串前加一个" "，之后再擦除。这样的话只需判断空白符即可
#include "stdio.h"
#include "string"
using namespace std;
bool whiteJudge(char c){
    if (c == ' ' || c == '\t' || c == '\r' || c == '\n')
        return true;
    else
        return false;
}

int main(){
    char buf[120];
    fgets(buf,120,stdin);
    string str = buf;
    str.pop_back();
    str = " "+str;
    for (int i = 0; i < str.size(); ++i) {
        if (whiteJudge(str[i])){
            if(str[i+1] >= 'a' && str[i+1] <= 'z')
            str[i+1] -= 32;
        }
    }
    str.erase(0,1);//擦除一开始加的" "
    printf("%s",str.c_str());
}