String searching in linked list by C

Question

Facing problem in while loop for if condition, conditional values are equal but not going inside in if condition.

void searchList(char name[20])
    {
        char contactName[20];
        strcpy(contactName,name);
        struct node *temp = head;
        printf("\nSearch Contact : \n");
        printf("-------------------\n");
        printf("Name : %s\n",name);
        while (temp != NULL)
        {
            if(temp->name == contactName)
            {
                printf("Contact Name : %s\n",temp->name);
                printf("Contact Number : %s\n", temp->phone);
            }
            temp = temp->next;
        }
    }

Use strcmp to compare strings, equating string names doesn't work in C. String name actually represents address of first location, so you are actually comparing addresses and not the strings. — akshayk07, Jul 24 '17 at 05:33
Use `strcmp` to compare strings in C. E.g `if(temp->name == contactName)` --> `if(strcmp(temp->name, contactName) ==0)` — BLUEPIXY, Jul 24 '17 at 05:33

score 1 · Accepted Answer · edited Jul 24 '17 at 05:52

1

You should use the strcmp function from string.h library to compare the strings:

 #include <string.h>

 ...

 if (strcmp(temp->name, contactName) == 0) {
     ...
 }

See more info here https://stackoverflow.com/a/8004250/492620

edited Jul 24 '17 at 05:52

akshayk07

2,092
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answered Jul 24 '17 at 05:34

oz123

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1

Shouldn't it be `== 0`? – CinCout Jul 24 '17 at 05:35
1

You mean `==` and not `!=`.Right? – Gaurav Sehgal Jul 24 '17 at 05:35
yes. Sorry, hasty typing ... – oz123 Jul 24 '17 at 05:36
Is there any library dependency to using strcpy()? – Hasib Kamal Chowdhury Jul 24 '17 at 05:38
1

You need to use '#inculde ' header file in your code – kvk30 Jul 24 '17 at 05:42
It's working now, Thank you. – Hasib Kamal Chowdhury Jul 24 '17 at 05:51

String searching in linked list by C

1 Answers1