题解 | #首字母大写#

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#define len 2000

char res[len];

void initial_res(){
    for(int i = 0;i<len;i++){
        res[i] = '\0';
    }
}

void bebigger(char*c){
    *c = *c+('A'-'a');
}

int isABC(char c){
    if(c>='a'&&c<='z'||c>='A'&&c<='Z'){
        return 1;
    }
    return 0;
}

void change(char str[],int n){
    int flag = 0;
    if(isABC(str[0])==1){
        bebigger(&str[0]);
    }
    for(int i = 0;i<n;i++){
        if(str[i]==' '||str[i]=='\t'||str[i]=='\r'||str[i]=='\n'){
            flag = 1;
            continue;
        }
        if(flag){
            if(isABC(str[i])==1){
                bebigger(&str[i]);
            }
            flag = 0;
        }
    }
}

int main(){
    char str[len];
    while(fgets(str,sizeof(str),stdin)){
        int n = strlen(str)-1;
        //initial_res();
        change(str,n);
        printf("%s\n",str);
    }
}