새싹교실/2020/새싹부터나무까지/민기범/실습/20.10.09 (rev. 1.17)
//strcpy
char strcpy(char* dest, char* source) {
char* dptr = dest;
do {
*dptr++ = *(source++);
} while (*source);
return dest;
}
1-2 ¶
//strlen
char strlen(char* dest) {
int length = 0;
for (int i = 0; dest[i] != '\0'; i++) {
length++;
}
return length;
}
1-3 ¶
//strcat
char* strcat(char* dest, const char* source) {
char* tmp = dest;
while (*dest)
dest++;
while (*source != '\0')
(*dest++ = *source++);
return tmp;
}
1-4 ¶
//strcmp
int strcmp(char* dest, const char* source) {
char c1, c2;
do {
if (*dest++ < *source++)
return 1;
else if (*dest++ > * source++)
return -1;
} while (*dest != '\0');
return 0;
}