Short source demonstrating the effects of using the wrong specifier on scanf

scanf_wrong_length.c

// The MIT License (MIT)

// Copyright (c) 2016 Leonardo de Oliveira Lourenço

// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:

// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.

// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

#include <stdio.h>

void print_short_v( short *v, size_t length );

int main( void )
{
    short v[3] = {0x2525, 0x2525, 0x2525};

    printf( "Sizeof short: %2lu\n", sizeof( short ) );
    printf( "  Sizeof int: %2lu\n", sizeof( int ) );

    printf( "\nVector before reading:\n" );
    print_short_v( v, 3 );

    if( sizeof( short ) == sizeof( int ) )
    {
        printf( "\nThis program is meant to demonstrate failure when reading a short as "
                "an int, but their sizes are equal on your environment. Sorry.\n" );
    }
    else
    {
        printf( "\nPlease input an integer: " );
        scanf( " %d", v + 1 );

        printf( "\nVector after reading:\n" );
        print_short_v( v, 3 );
    }

    printf( "\n\nProgram endend.\n" );

    return 0;
}

void print_short_v( short *v, size_t length )
{
    size_t i;

    for( i = 0; i < length; ++i )
    {
        printf( "%5hd ", v[i] );
    }
    printf( "\n" );
}

Example output: