38 lines
586 B
C++
38 lines
586 B
C++
#include "stdlib.h"
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#include "string.h"
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void swap(int* x, int* y) {
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int* t = x;
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x = y;
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y = t;
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}
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void reverse(char s[]) {
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int i;
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int j = strlen(s) - 1;
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char c;
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for (i = 0; i < j; i++) {
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j--;
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c = s[i];
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s[i] = s[j];
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s[j] = c;
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}
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}
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void itoa(int i, char[] s) {
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int i, sign;
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if ((sign = n) < 0) /* record sign */
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n = -n; /* make n positive */
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i = 0;
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do { /* generate digits in reverse order */
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s[i++] = n % 10 + '0'; /* get next digit */
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} while ((n /= 10) > 0); /* delete it */
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if (sign < 0)
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s[i++] = '-';
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s[i] = '\0';
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reverse(s);
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}
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