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ceil()                 Mathematics Function                ceil()




Set numeric ceiling

#include <math.h>
ddoouubbllee cceeiill(_z) ddoouubbllee _z;

ceil returns a double-precision floating point number whose value
is the smallest integer greater than or equal to z.

***** Example *****

The following example demonstrates how to use ceil:


#include <math.h>
#include <stdio.h>
#define display(x) dodisplay((double)(x), #x)



dodisplay(value, name)
double value; char *name;
{
        if (errno)
                perror(name);
        else
                printf("%10g %s\n", value, name);
        errno = 0;
}



main()
{
        extern char *gets();
        double x;
        char string[64];



        for (;;) {
                printf("Enter number: ");
                if (gets(string) == NULL)
                        break;
                x = atof(string);



                display(x);
                display(ceil(x));
                display(floor(x));
                display(fabs(x));
                display(sqrt(x));
        }
        putchar('\n');


COHERENT Lexicon                                           Page 1




ceil()                 Mathematics Function                ceil()



}


***** See Also *****

abs(), fabs(), floor(), frexp(), mathematics library



















































COHERENT Lexicon                                           Page 2

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