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# include <stdio.h>
/* ºê¶¨Òå */
# define MAX 100
# define LEN 80
 
/* Ò»¸ö·Ç³£¼òµ¥µÄÎı¾±à¼­Æ÷ */
int main()
{
    char text[MAX][LEN];  // ¶¨Òå×Ö·ûÐÍÊý×é
    register int t, i, j;    /* ¶¨ÒåÈý¸ö¼Ä´æÆ÷±äÁ¿ */
    /* ÖðÐÐÊäÈë×Ö·û´® */
    for(t=0; t<MAX; t++)    
    {
        printf("%d: ", t);
        gets(text[t]);
        if(!text[t][0])
            break;  /* ¿ÕÐÐÍ˳ö */
    }
     
    /* °´ÐУ¬Öð¸ö×Ö·ûÊä³ö×Ö·û´® */
    for(i=0; i<t; i++)  
    {
        for(j=0; text[i][j]; j++)
            putchar(text[i][j]);
        putchar('\n');
    }
    return 0;
}


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# include <stdio.h>
 
int main()
{
    int i, j, k;
     
    /* ±äÁ¿i´Ó0µ½4£¬±íʾËù»­ÁâÐÎͼµÄµÚÒ»ÖÁµÚÎåÐÐ */
    for(i = 0; i <= 4; i++)
    {
        /* ......

C_ÔËÓÃdo

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# include <math.h>
# include <stdio.h>    /* Êýѧº¯Êý¿â */
 
int main()
{
    /* ÓÃs±íʾ¶àÏîʽµÄÖµ£¬ÓÃt±íʾÿһÏîµÄÖµ */
    double s, t, x; // ´Ë´¦ÓÃË«¾«¶ÈÉùÃ÷±äÁ¿
    int n;
    printf ......

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# include <stdio.h>
 
int main( )
{
    int radius;
    double area;
    for(radius = 1; radius <= 10 ; radius++)
    {
        area = 3.1416 * radius * radius;
   ......

C_ÔÚswitch

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# include <stdlib.h>
# include <stdio.h>
 
int main()
{
    int month;
    int day;
     
    printf("please input the month number: ");
    scanf("%d", &mo ......
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