Question

How to find a string in an array of structs using bsearch with C

Answer 1

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

// void* bsearch( const void *key, const void *ptr, size_t count, size_t size,
//                int (*comp)(const void*, const void*) );

typedef struct DB {
    int code;
    char language[16];
} DB;

DB data[] = { {1, "C"}, {2, "C++"}, {3, "Java"}, {4, "Python"}, {5, "C#"} };

int compare(const void* s1, const void* s2) {
    return strcmp(s1, ((const DB*)s2)->language);
}

int main(void)
{
    char str[] = "Python";

    DB const* result = bsearch(str, data, sizeof data / sizeof data[0], sizeof data[0], compare);

    if (result) {
        printf("found: %d: %s\n", result->code, result->language);
    }
    else {
        printf("not found\n");
    }
}




/*
run:

found: 3: Java

*/

 

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