Q: What is the difference between these initializations?
char a = "string literal"; char *p = "string literal";My program crashes if I try to assign a new value to p[i].
A: A string literal (the formal term for a double-quoted string in C source) can be used in two slightly different ways:
Some compilers have a switch controlling whether string literals are writable or not (for compiling old code), and some may have options to cause string literals to be formally treated as arrays of const char (for better error catching).
See also questions 1.31, 6.1, 6.2, 6.8, and 11.8b.
K&R2 Sec. 5.5 p. 104
ISO Sec. 6.1.4, Sec. 6.5.7
Rationale Sec. 3.1.4
H&S Sec. 2.7.4 pp. 31-2