The following code example is taken from the book
Object-Oriented Programming in C++
by Nicolai M. Josuttis, Wiley, 2002
© Copyright Nicolai M. Josuttis 2002
// C header file for I/O
#include <stdio.h>
// C header file for the string treatment
#include <string.h>
void f()
{
const char* c = "input: "; // string constant
char text[81]; // string variable for 80 characters
char s[81]; // string variable for the input (up to 80 characters)
/* read string s
* - because of limited memory, no more than 80 characters
*/
if(scanf("%80s", s) != 1) {
// read error
//...
}
// compare string with empty string
if(strcmp(s,"") == 0) {
/* assign string literal to string text
* - CAUTION: text has to be big enough
*/
strcpy(text, "no input");
}
else {
/* assign string constants c, followed by read string, to text
* - CAUTION: text has to be big enough
*/
if(strlen(c)+strlen(s) <= 80) {
strcpy (text, c);
strcat (text, s);
}
}
//...
}