C語言函數(shù)大全(l開頭)

函數(shù)名: labs
    用 法: long labs(long n);
    程序例:
    #include
    #include
    int main(void)
    {
    long result;
    long x = -12345678L;
    result= labs(x);
    printf("number: %ld abs value: %ld\n",
    x, result);
    return 0;
    }
    函數(shù)名: ldexp
    功 能: 計算value*2的冪
    用 法: double ldexp(double value, int exp);
    程序例:
    #include
    #include
    int main(void)
    {
    double value;
    double x = 2;
    /* ldexp raises 2 by a power of 3
    then multiplies the result by 2 */
    value = ldexp(x,3);
    printf("The ldexp value is: %lf\n",
    value);
    return 0;
    }
    函數(shù)名: ldiv
    功 能: 兩個長整型數(shù)相除, 返回商和余數(shù)
    用 法: ldiv_t ldiv(long lnumer, long ldenom);
    程序例:
    /* ldiv example */
    #include
    #include
    int main(void)
    {
    ldiv_t lx;
    lx = ldiv(100000L, 30000L);
    printf("100000 div 30000 = %ld remainder %ld\n", lx.quot, lx.rem);
    return 0;
    }