第二个程序.cpp

来自「数据结构中有关队列操作的实例」· C++ 代码 · 共 64 行

#include<stdio.h>
#include<conio.h>
#include<stdlib.h>
#include<time.h>

void main()
{
	FILE *fp;
	char ch,sh;
	int i;
	if((fp=fopen("string","wt+"))==NULL)
	{
		printf("cannot open file strike any key exit!");
		getch();
		exit(1);
	}

	printf("Please choose computer input(C) or person input(P)");
	sh=getchar();

	if(sh=='C')
	{
		srand(time(NULL));
		while(i<=(3+rand()%10))
		{
			fputc(ch,fp);
			ch=(1+rand()%9);
			i++;
		}
		rewind(fp);
		ch=fgetc(fp);
		while(ch!=EOF)
		{
			putchar(ch);
			ch=fgetc(fp);

		}
		printf("\n");
		getch();
		fclose(fp);
	}

	else if(sh=='P')
	{
		printf("input a srting\n");
		ch=getchar();
		while(ch!='\n')
		{
			fputc(ch,fp);
			ch=getchar();
		}

		rewind(fp);
		ch=fgetc(fp);
		while(ch!=EOF)
		{
			putchar(ch);
			ch=fgetc(fp);
		}
		printf("\n");
		fclose(fp);
		getch();
	}
}