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72 lines
1.0 KiB
C
72 lines
1.0 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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typedef struct{
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char *dig;
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int n;
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char sign;
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} LongN;
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LongN getLongN(char * s);
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void printLong(LongN x);
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int main() {
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LongN a;
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a.dig = (char*)calloc(101, sizeof(char));
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a.dig[0] = 12;
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a.dig[1] = 34;
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a.dig[2] = 5;
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a.n = 5;
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a.sign = 1;
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//printLong(a);
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char s[50]; //= "-1234";
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scanf("%s", s);
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LongN x = getLongN(s);
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printLong(x);
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free(a.dig);
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free(x.dig);
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return 0;
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}
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void printLong(LongN x) {
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if (x.sign) {
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printf("-");
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}
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if (x.n % 2) {
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x.n++;
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}
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for (int i = 0; i < (int)(x.n/2); ++i) {
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printf("%d", x.dig[i]);
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}
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printf("\n");
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}
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LongN getLongN(char* s) {
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int k = 0;
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LongN r;
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r.sign = 0;
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if (s[0] == '-') {
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k = 1;
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r.sign = 1;
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}
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if (s[0] == '+')
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k = 1;
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int l = k;
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for (; s[l] >= '0' && s[l] <= '9'; ++l);
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r.n = (l - k - 1) / 2 + 1;
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r.dig = (char*)calloc(101, sizeof(char));
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int t = 0;
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for (int i = l - 1; i >= k; i -= 2, t++) {
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if (i == k) {
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r.dig[t] = s[i] - '0';
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}
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else
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r.dig[t] = 10 * (s[i - 1] - '0') + s[i] - '0';
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}
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return r;
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}
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