📝⚡Beginner

Compare Two Strings

Compare strings

Compare two strings character by character. Returns 0 if equal, negative if str1 < str2, positive if str1 > str2.

Program Code

string_compare.c

1#include <stdio.h>
2
3int stringCompare(char str1[], char str2[]) {
4    int i = 0;
5    while (str1[i] != '\0' && str2[i] != '\0') {
6        if (str1[i] != str2[i]) {
7            return str1[i] - str2[i];
8        }
9        i++;
10    }
11    return str1[i] - str2[i];
12}
13
14int main() {
15    char str1[50], str2[50];
16    
17    printf("Enter first string: ");
18    scanf("%49s", str1);
19    printf("Enter second string: ");
20    scanf("%49s", str2);
21    
22    int result = stringCompare(str1, str2);
23    
24    if (result == 0)
25        printf("Strings are equal\n");
26    else if (result < 0)
27        printf("\"%s\" comes before \"%s\"\n", str1, str2);
28    else
29        printf("\"%s\" comes after \"%s\"\n", str1, str2);
30    
31    return 0;
32}