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# include <stdio.h>
 
int main( )
{
    int radius;
    double area;
    for(radius = 1; radius <= 10 ; radius++)
    {
        area = 3.1416 * radius * radius;
        /* ÈôÔ²Ãæ»ý³¬¹ý120£¬ÔòÌø³öforÑ­»·£¬²»ÓèÊä³ö */
        if(area >= 120.0)
            break;  // Ìø³öÑ­»·
        printf("square = %f\n", area);
    }
    printf("now radius=%d\n\n", radius-1);
 
    for(radius = 1; radius <= 10 ; radius++)
    {
        area = 3.1416 * radius * radius;
        /* ÈôÔ²Ãæ»ýûÓг¬¹ý60£¬Ôò²»Êä³ö¶øÊÇ´ÓпªÊ¼Ñ­»· */
        if(area < 120.0)
            continue;  // »Øµ½Ñ­»·Í·²¿,¼ÌÐøÏÂһѭ»·
        printf("square = %f\n", area);
    }
    printf("now radius=%d\n", radius-1);
    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()
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    char c1, c2, c3, c4, c5, c6, c7;
    c1 = 'C';
    c2 = 'h';
    c3 = 'i';
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# include <stdio.h>
 
int main()
{
    int x, y;
    printf("ÇëÊäÈë×Ô±äÁ¿x£º");
    scanf("%d", &x);
 
    if(x < 6)
    {
        ......
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