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# include <stdio.h>
 
int main()
{
    int x, y;
    printf("ÇëÊäÈë×Ô±äÁ¿x£º");
    scanf("%d", &x);
 
    if(x < 6)
    {
        y = x - 12;
        printf("x = %d, y = %d\n", x, y);
    }
    else if(x < 15)
    {
        y = 3*x - 1;
        printf("x = %d, y = %d\n", x, y);
    }
    else
    {
        y = 5*x + 9;
        printf("x = %d, y = %d\n", x, y);
    }
    return 0;
}


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# include <stdio.h>
 
int main()
{
    /* »»Ðзû'\n'£¬ÓÃÓÚÊä³ö»»ÐÐ */
    printf("How are you?\n");
    printf("I am fine.\n\n");
 
    /* ºáÏòÌø¸ñ·û'\t'£¬Ê¹Ìøµ½ÏÂÒ»¸öÊä³öÇø */
  ......

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# include <stdio.h>
 
int main()
{
    /* ¶¨Òå×Ö·ûÐͱäÁ¿£¬²¢¸øËüÃǸ¶³õÖµ */
    char c1, c2, c3, c4, c5, c6, c7;
    c1 = 'C';
    c2 = 'h';
    c3 = 'i';
    c4 = 'n';
 & ......
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