C:基本文件操作

打开文件A,B,将内容排序后存入新文件C

#include<stdio.h>
#include<string.h>
int BubbleSort(char a[],int n){
	int i,j;
	for(i=0;i<n-1;i++){
		for(j=1;j<n-i;j++){
			if(a[j]<a[j-1]){
				int tem=a[j];
				a[j]=a[j-1];
				a[j-1]=tem;
			} 
		}
	} 
}
int main(){
	FILE *fp;
	int i,n;
	char ch,c[100];
	if((fp=fopen("D:\\text1.txt","r"))==NULL) return -1;
	else printf("Open A file\n");
	for(i=0;(ch=fgetc(fp))!=EOF;i++){
		c[i]=ch;
		putchar(c[i]);
	}
	fclose(fp);
	n=i;
	if((fp=fopen("D:\\text2.txt","r"))==NULL) return -1;
	else printf("\nOpen B file\n");
	for(i=0;(ch=fgetc(fp))!=EOF;i++){
		c[i+n]=ch;
		putchar(c[i+n]);
	}
	putchar('\n');
	fclose(fp);
	c[i+n]='\0'; 
	BubbleSort(c,strlen(c)); 
	fp=fopen("D:\\text3.txt","w");
	puts(c);
	fputs(c,fp); 
	fclose(fp);
	return 0;
}