ch5-strcpy (String copy), pointer version

Chapter_5     Exercise_5-2     strlen

strcmp     Exercise_5-3

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strcpy.c     K&R, p. 105-106         download

#include <stdio.h> // for printf(), scanf()

#define SIZE 100 // array size

void strcpy1(char*, char*);
void strcpy2(char*, char*);

int main()
{
char s[SIZE], t[SIZE];

printf("Type a word: ");

scanf("%s", t);

strcpy1(s, t);
printf("strcpy1(): %s\n", s);
strcpy2(s, t);
printf("strcpy2(): %s\n", s);

return 0;
}

void strcpy1(char *s, char *t) // copy t to s
{
int i = 0;

while (s[i] = t[i]) // while ((s[i] = t[i]) != '\0')
{i++;}
}
void strcpy2(char *s, char *t) // copy t to s
{
while (*s++ = *t++) // while ((*s++ = *t++) != '\0')
{}
}

/*
gcc strcpy.c -o strcpy
./strcpy
Type a word: abracadabra
strcpy1(): abracadabra
strcpy2(): abracadabra
*/

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Chapter_5     Exercise_5-2     strlen

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strcmp     Exercise_5-3