1 ¶
//strcpy char* strcpy(char s1[], char s2[]) { int i = 0; while (*(s1 + i)) { s1[i] = s2[i]; i++; } return s1; }
2 ¶
//strlen int strlen(char* p) { int length = 0, i = 0; while (*(p + i)) { length++; i++; } return length; }
3 ¶
//strcat void strcat(char s1[], char s2[]) { for (int i = strlen(s1); i < strlen(s1) + strlen(s2); i++) { s1[i] = s2[i]; } }