Comparing Two Strings – C:

How to compare two strings in C?

Comparing Two Strings:

• Generally, to compare two numbers or any condition to be achieved in C programming we use (==) operator but by using it we cannot compare two strings so in this scenario because using that operator will compare the reference of the string but not the strings.

• What we do?
• In this case we use the strcmp() string function which will compare two strings.
• In this you will have three cases in which you can compare your strings:
• When they are equal your result will be zero.

• When the first-string characters are matching with that of the second string then a positive value is returned.

• When the first-string characters and the second-string characters are completely different then it returns a negative value.

• Now let us see the coding part and understand it more clearly.

Code:

//Including libraries and definition of the main function.
#include<stdio.h>
#include<string.h>
int main()
{
//Declaring variables:
    char str1[40];
    char str2[100];
//Reading inputs from the user:
    printf("The first string is: ");
    scanf("%s",str1);
    printf("The second string is: ");
    scanf("%s",str2);
    int res;
//Declaring our result to the comparison function:
    res = strcmp(str1,str2);

 // Looping conditions:
    if(res==0){
        printf("The strings are same");
        
    }
    else{
        printf("They are not same");
    }
//Resulting value of our string:
    printf("\nValue of the resulted string is: %d",res);
}
//Whole code:
#include<stdio.h>
#include<string.h>
int main()
{
    char str1[40];
    char str2[100];
    printf("The first string is: ");
    scanf("%s",str1);
    printf("The second string is: ");
    scanf("%s",str2);
    int res;
    res = strcmp(str1,str2);
    
    if(res==0){
        printf("The strings are same");
        
    }
    else{
        printf("They are not same");
    }
    printf("\nValue of the resulted string is: %d",res);
}