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- pr 2.*
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- Jul 27 17:12 1984 2.34conv.c Page 1
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- /* type conversion */
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- main() /* print conversion table from cm to inches
- /* 1 inch = 2.54 cm - from 1 through 12 cm */
- {
- int cm;
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- for (cm = 1; cm <= 12; ++cm)
- printf("cm = %3d, inch = %6.2f\n", cm, cm / 2.54);
- }
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- Jul 27 17:12 1984 2.50comma.c Page 1
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- main() /* calculate the sum of all integers between and including
- /* 2 input integers, compute their average and remainder */
- { int i, n1, n2, ct, sm;
- n1 = getint(); n2 = getint();
- if (n1 <= n2)
- { for (ct = sm = 0, i = n1; i <= n2; ++i)
- { sm += i; ++ct;
- }
- printf("n1 = %d, n2 = %d, sum = %d, ave = %.2f, remainder = %d\n",
- n1, n2, sm, (float) sm / ct, sm % ct);
- }
- else
- { printf("2nd number not big enough\n"); exit(1);
- }
- }
- getint() /* function to convert ASCII
- /* input from terminal to an int */
- { int c, sign = 1, num = 0;
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- printf("input integer: ");
- if ((c = getchar()) == '-')
- sign = -1;
- else if (c >= '0' && c <= '9')
- num = (c - '0');
- else
- return (0);
- while ((c = getchar()) >= '0' && c <= '9')
- num = num * 10 + (c - '0');
- return (num * sign);
- }
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- Jul 27 17:12 1984 2.58itob.c Page 1
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- #define SZ 8 * sizeof(int) /* for portabilty */
- main() /* function to test itob(), integer to binary */
- { char asc[SZ+1];
- int i = getint();
- itob(i, asc);
- printf("dec = %d, octal = %o, binary = %s\n", i, i, asc);
- }
- itob(num, ar) /* convert int to ASCII 0's and 1's */
- int num; /* received int */
- char ar[]; /* array to store 0's and 1's */
- { int cnt, mask = 1;
- for (cnt = SZ - 1; cnt >= 0; --cnt)
- { ar[cnt] = ((num & mask)? '1': '0'); mask <<= 1;
- }
- ar[SZ] = '\0';
- }
- getint() /* function to convert ASCII
- /* input from terminal to an int */
- { int c, sign = 1, num = 0;
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- printf("input integer: ");
- if ((c = getchar()) == '-')
- sign = -1;
- else if (c >= '0' && c <= '9')
- num = (c - '0');
- else
- return (0);
- while ((c = getchar()) >= '0' && c <= '9')
- num = num * 10 + (c - '0');
- return (num * sign);
- }
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