Question

The following program implements a key-value data structure in which values are stored based on a string keyword. Currently, the program allows new keys and values to be entered, but there is no function to retrieve the values given a search key.

Complete the get_value function to retrieve a value given a search key. The function should print "INVALID KEY" if the key is not present.

Do not remove any code OR add any code to main. You should only add code to the function.

#include 

float get_value(char key[], char keys[],
                char values[], int length) {
    // Your code here
}

int main() {
    char keys[] = {
        "speed",
        "velocity",
        "range"
    };
    float values[] = { 101.8, 22.2, 30.1 };

    // Get the value associated with "speed"
    float value = get_value("speed", keys, values, 3);
    printf("value = %f\n", value);

    // Get the value associated with "change"
    value = get_value("change", keys, values, 3);
    printf("value = %f\n", value);

    return 0;
} 

Need it in 10 minutes, please.

Answer 1

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

float get_value(char key[], char keys[], char values[], int length) {
// flag=2 if we find the key in Keys arrays other wise flag=1
int flag=1;
// converting key char array value to string
strcpy(string, key);
// iterating Keys array and comparing with key string
for(int i=0;i<length; i++){
// if we find the key inside kyes array flag value become 2
// and return the value which match with key
if(string==keys[i]){
flag=2;
return values[i];
}
}
//if not mat key with keys arrays values
if(flag==1){
printf("INVALID KEY");
return 0;
}
}

int main() {
char keys[] = {
"speed",
"velocity",
"range"
};
float values[] = { 101.8, 22.2, 30.1 };

// Get the value associated with "speed"
float value = get_value("speed", keys, values, 3);
printf("value = %f\n", value);

// Get the value associated with "change"
value = get_value("change", keys, values, 3);
printf("value = %f\n", value);
return 0;
}
--------------------------------

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