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1.1 ! root 1: ! 2: ! 3: ceil() Mathematics Function ceil() ! 4: ! 5: ! 6: ! 7: ! 8: Set numeric ceiling ! 9: ! 10: #include <math.h> ! 11: ddoouubbllee cceeiill(_z) ddoouubbllee _z; ! 12: ! 13: ceil returns a double-precision floating point number whose value ! 14: is the smallest integer greater than or equal to z. ! 15: ! 16: ***** Example ***** ! 17: ! 18: The following example demonstrates how to use ceil: ! 19: ! 20: ! 21: #include <math.h> ! 22: #include <stdio.h> ! 23: #define display(x) dodisplay((double)(x), #x) ! 24: ! 25: ! 26: ! 27: dodisplay(value, name) ! 28: double value; char *name; ! 29: { ! 30: if (errno) ! 31: perror(name); ! 32: else ! 33: printf("%10g %s\n", value, name); ! 34: errno = 0; ! 35: } ! 36: ! 37: ! 38: ! 39: main() ! 40: { ! 41: extern char *gets(); ! 42: double x; ! 43: char string[64]; ! 44: ! 45: ! 46: ! 47: for (;;) { ! 48: printf("Enter number: "); ! 49: if (gets(string) == NULL) ! 50: break; ! 51: x = atof(string); ! 52: ! 53: ! 54: ! 55: display(x); ! 56: display(ceil(x)); ! 57: display(floor(x)); ! 58: display(fabs(x)); ! 59: display(sqrt(x)); ! 60: } ! 61: putchar('\n'); ! 62: ! 63: ! 64: COHERENT Lexicon Page 1 ! 65: ! 66: ! 67: ! 68: ! 69: ceil() Mathematics Function ceil() ! 70: ! 71: ! 72: ! 73: } ! 74: ! 75: ! 76: ***** See Also ***** ! 77: ! 78: abs(), fabs(), floor(), frexp(), mathematics library ! 79: ! 80: ! 81: ! 82: ! 83: ! 84: ! 85: ! 86: ! 87: ! 88: ! 89: ! 90: ! 91: ! 92: ! 93: ! 94: ! 95: ! 96: ! 97: ! 98: ! 99: ! 100: ! 101: ! 102: ! 103: ! 104: ! 105: ! 106: ! 107: ! 108: ! 109: ! 110: ! 111: ! 112: ! 113: ! 114: ! 115: ! 116: ! 117: ! 118: ! 119: ! 120: ! 121: ! 122: ! 123: ! 124: ! 125: ! 126: ! 127: ! 128: ! 129: ! 130: COHERENT Lexicon Page 2 ! 131: ! 132:
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