const Examples

• If we define

  const int x = 111;
  

then the following uses are wrong

x=999; /* ERROR, illegal lvalue */

++x; /* ERROR illegal lvalue */

• The prototype declaration for strcat is (in <string.h>)

• • char* strcat(char *s1, const char *s2);
  • 
    strcat() takes a (const) s2 and concatenate it to s1. const char *s2 guarantees that strcat() will not change s2.

Previous slide

Next slide

Back to first slide

View graphic version