#include <stdio.h>
    #include <stdlib.h>
    #include <string.h>
    #include <zip.h>
    
// apt-get install libzip-dev
// gcc source.c -lzip
    
    int main(){
       const char * path  = "archive.zip";
       const char * file     = "message";
       const char * data      = "Hello World!";
    
       int error = 0;
       struct zip *archive = zip_open(path, ZIP_CREATE, &error);
       if(error){
          printf("could not open or create archive\n");
          return -1;
       }
       struct zip_source *source = zip_source_buffer(archive, data, strlen(data), 0);
       if(source == NULL){
          printf("failed to create source buffer. %s\n",zip_strerror(archive));
          return -1;
       }
    
       int index = (int)zip_file_add(archive, file, source, ZIP_FL_OVERWRITE);
       if(index < 0){
          printf("failed to add file to archive: %s\n",zip_strerror(archive));
          return -1;
       }
    
       //zip_source_free(source);
       zip_close(archive);
    
       return 0;
    
    }