crimx/string reverse.c

## string reverse.c
void swap(char *a, char *b) {
    *a = *a^*b;
    *b = *a^*b;
    *a = *a^*b;
}

void reverse(char *a) {
    if(!a) return;
    int i, n = -1;
    while(a[++n]);
    for(i=0; i<n/2; i++) {
        swap(a+i, a+n-1-i);
    }
}
	void swap(char a, char b) {
	a = a^*b;
	b = a^*b;
	a = a^*b;
	}

	void reverse(char *a) {
	if(!a) return;
	int i, n = -1;
	while(a[++n]);
	for(i=0; i<n/2; i++) {
	swap(a+i, a+n-1-i);
	}
	}