Skema

#include <iostream>
#include <string.h>
#include <fstream>

using namespace std;

ifstream in("input.txt");
ofstream out("output.txt");

int main() {
    char sir[100];
    in.get(sir, 100, '\n');
    in.get();
    out << '{' << endl;
    while (!in.eof()) {
        char vehName[20], vehHash[20];
        char *cuvant = strtok(sir, " ");
        bool ePrimu = true;
        while (cuvant != NULL) {
            if (ePrimu) {
                strcpy(vehName, cuvant);
                ePrimu = false;
            } else {
                int l = strlen(cuvant);
                cuvant[l - 1] = '\0';
                strcpy(vehHash, cuvant);
            }
            cuvant = strtok(NULL, " ");
        }
        out << "\"" << vehHash << "\": \"" << vehName << "\"," << endl;
        in.get(sir, 100, '\n');
        in.get();
    }
    out << '}';
    in.close();
    out.close();
    return 0;
}