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Matching 2 string Problem

This is a discussion on Matching 2 string Problem within the C Programming forums, part of the General Programming Boards category; test[0].programme is assigned with "Hello World". Then I input "Hello World" into key.programme to compare it with test[0].programme but it ...

  1. #1
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    Matching 2 string Problem

    test[0].programme is assigned with "Hello World". Then I input "Hello World" into key.programme to compare it with test[0].programme but it just never work even it' already same. How can i solve it? TY

    Code:
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    
    struct record{
    	char programme[BUFSIZ];
    };
    
    typedef struct record record;
    
    int main(){
    
    	record key;
        record test[1];
    
        strcpy(test[0].programme, "Hello World\n"); 
        printf("Input received from test[0].programme: %s\n", test[0].programme);
    
        printf("Programme: ");
        fgets(key.programme, sizeof(key.programme),stdin);
    	printf("\nInput received from key: %s", key.programme);
    
    	if(key.programme == test[0].programme){ //compared but wont work
            printf("Working. Match found\n");
    	}else{
            printf("Nope. Something went wrong\n");
    	}
    }
    Name:  input.jpg
Views: 134
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  2. #2
    Registered User camel-man's Avatar
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    replace line 23 with if(strcmp(key.programme,test[0].programme)==0) you have to use string compare from string.h library
    ncode likes this.

  3. #3
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    Thanks!. Just wondering why I cant use if(key.programme == test[0].programme)? Srry if i annoy u.

  4. #4
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    I'm assuming your familiar with arrays. If not, I suggest you read a bit about it.

    To use strings in C, we use an array of characters.

    Say you declare
    char carray[10];

    Now, the variable "carray" represents the starting address of the array(which in this case is a string).

    Code:
    if(key.programme == test[0].programme)
    When you use this piece of code you're comparing the starting addresses of the two strings and not the strings themselves.

    If you wish to compare two strings in C you need to use the strcmp() function(look it up).

  5. #5
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    ok thanks

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