# 410

410
請撰寫一程式，讓使用者輸入一個正整數，並讀取read.txt檔案內容，read.txt檔案中包含多列英文句子。若輸入值為n，則讀取n列read.txt檔案內容，將n列中的每個英文單字字首轉為大寫再輸出，並寫入至write.txt檔案。
	
輸入說明　一個正整數n，並讀取read.txt檔案內容
輸出說明　將n列中的每個英文單字字首轉為大寫再輸出，並寫入至write.txt檔案

範例輸入　5
範例輸出
Hello World!
What Is The Weather Like Out There?
Are You Ok?
What's Today's Date?
Excuse Me!

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define LEN 100
void Capitalized(char *s, char *output);

int main()
{
	int n;
	scanf("%d", &n);
	
	FILE *fin = fopen("read.txt", "r");
	FILE *fout = fopen("write.txt", "w");
	char buf[LEN];
	char output[LEN] = {'\0'};
	//fscanf(fin, "%[^\n]%*c", buf); //%*[^\n]%*c
	
	for (int i=0; i<n; ++i)
	{
		fgets(buf, LEN, fin); //從fin最多取LEN個字元(包含'\0')到buf
		Capitalized(buf, output);
		printf("%s", output);
		fputs(output, fout);
		memset(output,0,LEN);
	}
	//while (fgets(buf, sizeof(buf), fin) )
	//while (fgets(buf, LEN, fin) ) 
	fclose(fin);
	fclose(fout);
}

void Capitalized(char *s, char *output)
{
	for (int i=0; i<strlen(s); ++i)
	{
		if (s[0] != ' ') 
			s[0]-=32; 
		if (s[i] == ' ') 
			s[i+1]-=32; 
		output[i] = s[i];
	}
}



#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define LEN 1024
void Capitalized(char *s, char *output);

int main()
{
	int n;
	scanf("%d", &n);
	
	FILE *fin = fopen("read.txt", "r");
	FILE *fout = fopen("write.txt", "w");
	char buf[LEN];
	char output[LEN] = {'\0'};
	
	for (int i=0; i<n; ++i)
	{
		//跳過前n行
		fscanf(fin, "%[^\n]%*c", buf); //%*[^\n]%*c
		//fscanf(fin, "%*[^\n]%*c");
	}
	//while (fgets(buf, sizeof(buf), fin) )
	while (fgets(buf, LEN, fin) ) //從fin最多取LEN個字元到buf
	{
		Capitalized(buf, output);
		printf("%s", output);
		fputs(output, fout);
		memset(output,0,LEN);
	}
	fclose(fin);
	fclose(fout);
}

void Capitalized(char *s, char *output)
{
	int len=strlen(s);
	for (int i=0; i<len; ++i)
	{
		if (s[0] != ' ') 
			s[0]-=32; 
		if (s[i] == ' ') 
			s[i+1]-=32; 
		output[i] = s[i];
	}
}



#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define LEN 1024
void Capitalized(char *s, char *output);

int main()
{
	int n;
	scanf("%d", &n);
	
	FILE *fin = fopen("read.txt", "r");
	FILE *fout = fopen("write.txt", "w");
	char buf[LEN];
	char output[LEN] = {'\0'};
	
	for (int i=0; i<n; ++i)
	{
		fscanf(fin, "%[^\n]%*c", buf); //%*[^\n]%*c
		Capitalized(buf, output);
		printf("%s\n", output);
		fputs(output, fout);
		memset(output,0,LEN);
	}
	//while (fgets(buf, sizeof(buf), fin) )
	fclose(fin);
	fclose(fout);
}

void Capitalized(char *s, char *output)
{
	int len=strlen(s);
	for (int i=0; i<len; ++i)
	{
		if (s[0] != ' ') 
			s[0]-=32; 
		if (s[i] == ' ') 
			s[i+1]-=32; 
		output[i] = s[i];
	}
}



#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#define LEN 1024
void Capitalized(char *s, char *output);

int main()
{
	int n;
	scanf("%d", &n);
	
	FILE *fin = fopen("read.txt", "r");
	FILE *fout = fopen("write.txt", "w");
	char buf[LEN];
	char output[LEN] = {'\0'};
	
	for (int i=0; i<n-1; ++i)
	{
		fscanf(fin, "%[^\n]%*c", buf); //%*[^\n]%*c
		Capitalized(buf, output);
		printf("%s\n", output);
		fputs(output, fout);
		memset(output,0,LEN);
	}
	fscanf(fin, "%[^\n]", buf); //%*[^\n]%*c
	buf[strlen(buf)-1] = '\0';
	Capitalized(buf, output);
	printf("%s", output);
	fputs(output, fout);
	//memset(output,0,LEN);
	
	//while (fgets(buf, sizeof(buf), fin) )
	fclose(fin);
	fclose(fout);
}

void Capitalized(char *s, char *output)
{
	int len=strlen(s);
	for (int i=0; i<len; ++i)
	{
		if (s[0] != ' ') 
			s[0]-=32; 
		if (s[i] == ' ') 
			s[i+1]-=32; 
		output[i] = s[i];
	}
}


"%n[a-z]" 读入最多n个字符,如果遇到非a-z的字符,停止
"%[^=]" 读入任意多的字符,直到遇到"="停止

对scanf(“%*[^\n]%*c”)解释：

 ％〔^\n〕将逐个读取缓冲区中的’\n’字符之前的其它字符，％后面的*表示将读取的这些字符丢弃，前遇到’\n’字符时便停止读取操作，此时，缓冲区中尚有一个’\n’字符遗留，所以后面的％*c将读取并丢弃这个遗留的换行符，这里的星号和前面的星号作用相同。由于所有从键盘的输入都是以回车结束的，而回车会产生一个’\n’字符，所以将’\n’连同它之前的字符全部读取并丢弃之后，也就相当于清除了输入缓冲区。
https://blog.csdn.net/Veniversum/article/details/62048870