Mega Code Archive
Default Arguments vs Overloading
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#include <iostream>
#include <cstring>
using namespace std;
void mystrcat(char *s1, char *s2, int len = -1);
int main()
{
char str1[80] = "This is a test";
char str2[80] = "0123456789";
mystrcat(str1, str2, 5); // concatenate 5 chars
cout << str1 << '\n';
strcpy(str1, "This is a test"); // reset str1
mystrcat(str1, str2); // concatenate entire string
cout << str1 << '\n';
return 0;
}
// A custom version of strcat().
void mystrcat(char *s1, char *s2, int len)
{
// find end of s1
while(*s1) s1++;
if(len == -1) len = strlen(s2);
while(*s2 && len) {
*s1 = *s2; // copy chars
s1++;
s2++;
len--;
}
*s1 = '\0'; // null terminate s1
}
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