Functions that implement the same functions as strlen, strcpy, strcat, and strcmp: stringLength, stringCopy, stringCatch, stringCompare, strcpystrcat

Functions that implement the same functions as strlen, strcpy, strcat, and strcmp: stringLength, stringCopy, stringCatch, stringCompare, strcpystrcat

1 # import <Foundation/Foundation. h> 2 3/* 4 evaluate the string length 5 */6 int stringLength (char arr []); 7 8 9/* 10 copy string 11 copy arr1 to arr12 */13 void stringCopy (char arr [], char arr1 []); 14 15 16 17/* 18 concatenated string 19 add arr1 to arr 20 */21 void stringCatch (char arr [], char arr1 []); 22 23 24/* 25 comparison string 26 */27 int stringCompare (char arr [], char arr1 []);

 

 

 

 1 #import "FunctionOfArray.h" 2  3 int stringLength(char arr[]){ 4     int length = 0; 5     while (arr[length] != '\0') { 6         length++; 7     } 8     return length; 9 }10 11 12 void stringCopy(char arr[],char arr1[]){13     int i = 0;14     while (arr1[i] != '\0') {15         arr[i] = arr1[i];16         i++;17     }18     arr[i] = '\0';19 }20 21 void stringCatch(char arr[],char arr1[]){22     int k = stringLength(arr);23     int j = stringLength(arr1);24     for (int i = 0; i < j; i++) {25         arr[k+i] = arr1[i];26     }27     arr[k + j] = '\0';28 }29 30 int stringCompare(char arr[],char arr1[]){31     int k = stringLength(arr);32     int j = stringLength(arr1);33     34     for (int i = 0; i < k && i< j; i++) {35         if(arr[i] != arr1[i]){36             return (int)arr[i] - (int)arr1[i];37         }38     }39     if(k == j){40         return 0;41     }else if(k > j ){42         return (int)arr[j] - (int)arr1[j];43     }else{44         return (int)arr[k] - (int)arr1[k];45     }46 }