58 lines
766 B
C++
58 lines
766 B
C++
/*
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Nome: Mario
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Cognome: Montanari
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getDigit
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*/
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#include <iostream>
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#include <cctype>
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#define SIZE 100+1
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using namespace std;
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char *getDigit(char *const str);
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int main(void) {
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char str[SIZE] = "H3ll0 W0rld! 2025";
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cout << "Before: " << str << endl;
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getDigit(str);
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cout << "After: " << str << endl;
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return 0;
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}
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// Con puntatori
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char *getDigit(char *const str) {
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char *w = str;
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for (char *r = str; *r != '\0'; r++) {
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if (isdigit(*r)) {
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*w++ = *r;
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}
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}
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*w = '\0';
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return str;
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}
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/* Senza puntatori
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char *getDigit(char *const str) {
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int w = 0;
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for (int r = 0; str[r] != '\0'; r++) {
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if (isdigit(str[r])) {
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str[w++] = str[r];
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}
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}
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str[w] = '\0';
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return str;
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}
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*/ |